Simlar - secure calls
Simlar is based on the established end-to-end encryption protocol ZRTP. No one can listen to your conversation, not even us. During your first call, you need to match a short code with the person you are speaking to. This protects against man-in-the-middle attacks and only needs to be done once per contact.
The app development is driven by the open source community. You can find the source code at simlar.org.
Simlar is free of charge. All you need is an internet connection. The more stable it is, the better your sound quality. The average “traffic” corresponds to 1 megabyte for a 2-minute call. For more details see simlar.org.
Anti-Features
This app has features you may not like. Learn more!
- Author: support@simlar.org
- License: GNU General Public License v2.0 or later
- Website
- Issue Tracker
- Source Code
- Build Metadata
Versions
Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.
Download F-Droid-
arm64-v8a
This version requires Android 6.0 or newer.
It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.
Permissions
-
view network connectionsAllows the app to view information about network connections such as which networks exist and are connected.
-
access Do Not DisturbAllows the app to read and write Do Not Disturb configuration.
-
view Wi-Fi connectionsAllows the app to view information about Wi-Fi networking, such as whether Wi-Fi is enabled and name of connected Wi-Fi devices.
-
pair with Bluetooth devicesAllows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
-
connect to paired Bluetooth devicesAllows the app to connect to paired Bluetooth devices
-
take pictures and videosThis app can take pictures and record videos using the camera while the app is in use.
-
allow Wi-Fi Multicast receptionAllows the app to receive packets sent to all devices on a Wi-Fi network using multicast addresses, not just your phone. It uses more power than the non-multicast mode.
-
run foreground serviceAllows the app to make use of foreground services.
-
run foreground service with the type "camera"Allows the app to make use of foreground services with the type "camera"
-
run foreground service with the type "dataSync"Allows the app to make use of foreground services with the type "dataSync"
-
run foreground service with the type "microphone"Allows the app to make use of foreground services with the type "microphone"
-
run foreground service with the type "phoneCall"Allows the app to make use of foreground services with the type "phoneCall"
-
have full network accessAllows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
-
route calls through the systemAllows the app to route its calls through the system in order to improve the calling experience.
-
change your audio settingsAllows the app to modify global audio settings such as volume and which speaker is used for output.
-
show notificationsAllows the app to show notifications
-
read your contactsAllows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
-
android.permission.READ_LOGS
-
read phone numbersAllows the app to access the phone numbers of the device.
-
read phone status and identityAllows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
-
run at startupAllows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
-
record audioThis app can record audio using the microphone while the app is in use.
-
display notifications as full screen activities on a locked deviceAllows the app to display notifications as full screen activities on a locked device
-
control vibrationAllows the app to control the vibrator.
-
prevent phone from sleepingAllows the app to prevent the phone from going to sleep.
-
org.simlar.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 23 MiB PGP Signature | Build Log
-
-
x86
This version requires Android 6.0 or newer.
It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.
Permissions
-
view network connectionsAllows the app to view information about network connections such as which networks exist and are connected.
-
access Do Not DisturbAllows the app to read and write Do Not Disturb configuration.
-
view Wi-Fi connectionsAllows the app to view information about Wi-Fi networking, such as whether Wi-Fi is enabled and name of connected Wi-Fi devices.
-
pair with Bluetooth devicesAllows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
-
connect to paired Bluetooth devicesAllows the app to connect to paired Bluetooth devices
-
take pictures and videosThis app can take pictures and record videos using the camera while the app is in use.
-
allow Wi-Fi Multicast receptionAllows the app to receive packets sent to all devices on a Wi-Fi network using multicast addresses, not just your phone. It uses more power than the non-multicast mode.
-
run foreground serviceAllows the app to make use of foreground services.
-
run foreground service with the type "camera"Allows the app to make use of foreground services with the type "camera"
-
run foreground service with the type "dataSync"Allows the app to make use of foreground services with the type "dataSync"
-
run foreground service with the type "microphone"Allows the app to make use of foreground services with the type "microphone"
-
run foreground service with the type "phoneCall"Allows the app to make use of foreground services with the type "phoneCall"
-
have full network accessAllows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
-
route calls through the systemAllows the app to route its calls through the system in order to improve the calling experience.
-
change your audio settingsAllows the app to modify global audio settings such as volume and which speaker is used for output.
-
show notificationsAllows the app to show notifications
-
read your contactsAllows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
-
android.permission.READ_LOGS
-
read phone numbersAllows the app to access the phone numbers of the device.
-
read phone status and identityAllows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
-
run at startupAllows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
-
record audioThis app can record audio using the microphone while the app is in use.
-
display notifications as full screen activities on a locked deviceAllows the app to display notifications as full screen activities on a locked device
-
control vibrationAllows the app to control the vibrator.
-
prevent phone from sleepingAllows the app to prevent the phone from going to sleep.
-
org.simlar.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 24 MiB PGP Signature | Build Log
-
-
armeabi-v7a
This version requires Android 6.0 or newer.
It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.
Permissions
-
view network connectionsAllows the app to view information about network connections such as which networks exist and are connected.
-
access Do Not DisturbAllows the app to read and write Do Not Disturb configuration.
-
view Wi-Fi connectionsAllows the app to view information about Wi-Fi networking, such as whether Wi-Fi is enabled and name of connected Wi-Fi devices.
-
pair with Bluetooth devicesAllows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
-
connect to paired Bluetooth devicesAllows the app to connect to paired Bluetooth devices
-
take pictures and videosThis app can take pictures and record videos using the camera while the app is in use.
-
allow Wi-Fi Multicast receptionAllows the app to receive packets sent to all devices on a Wi-Fi network using multicast addresses, not just your phone. It uses more power than the non-multicast mode.
-
run foreground serviceAllows the app to make use of foreground services.
-
run foreground service with the type "camera"Allows the app to make use of foreground services with the type "camera"
-
run foreground service with the type "dataSync"Allows the app to make use of foreground services with the type "dataSync"
-
run foreground service with the type "microphone"Allows the app to make use of foreground services with the type "microphone"
-
run foreground service with the type "phoneCall"Allows the app to make use of foreground services with the type "phoneCall"
-
have full network accessAllows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
-
route calls through the systemAllows the app to route its calls through the system in order to improve the calling experience.
-
change your audio settingsAllows the app to modify global audio settings such as volume and which speaker is used for output.
-
show notificationsAllows the app to show notifications
-
read your contactsAllows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
-
android.permission.READ_LOGS
-
read phone numbersAllows the app to access the phone numbers of the device.
-
read phone status and identityAllows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
-
run at startupAllows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
-
record audioThis app can record audio using the microphone while the app is in use.
-
display notifications as full screen activities on a locked deviceAllows the app to display notifications as full screen activities on a locked device
-
control vibrationAllows the app to control the vibrator.
-
prevent phone from sleepingAllows the app to prevent the phone from going to sleep.
-
org.simlar.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 22 MiB PGP Signature | Build Log
-
-
arm64-v8a
This version requires Android 6.0 or newer.
It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.
Permissions
-
view network connectionsAllows the app to view information about network connections such as which networks exist and are connected.
-
access Do Not DisturbAllows the app to read and write Do Not Disturb configuration.
-
pair with Bluetooth devicesAllows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
-
connect to paired Bluetooth devicesAllows the app to connect to paired Bluetooth devices
-
take pictures and videosThis app can take pictures and record videos using the camera while the app is in use.
-
allow Wi-Fi Multicast receptionAllows the app to receive packets sent to all devices on a Wi-Fi network using multicast addresses, not just your phone. It uses more power than the non-multicast mode.
-
run foreground serviceAllows the app to make use of foreground services.
-
run foreground service with the type "camera"Allows the app to make use of foreground services with the type "camera"
-
run foreground service with the type "dataSync"Allows the app to make use of foreground services with the type "dataSync"
-
run foreground service with the type "microphone"Allows the app to make use of foreground services with the type "microphone"
-
run foreground service with the type "phoneCall"Allows the app to make use of foreground services with the type "phoneCall"
-
have full network accessAllows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
-
change your audio settingsAllows the app to modify global audio settings such as volume and which speaker is used for output.
-
show notificationsAllows the app to show notifications
-
read your contactsAllows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
-
android.permission.READ_LOGS
-
read phone numbersAllows the app to access the phone numbers of the device.
-
read phone status and identityAllows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
-
run at startupAllows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
-
record audioThis app can record audio using the microphone while the app is in use.
-
display notifications as full screen activities on a locked deviceAllows the app to display notifications as full screen activities on a locked device
-
control vibrationAllows the app to control the vibrator.
-
prevent phone from sleepingAllows the app to prevent the phone from going to sleep.
-
org.simlar.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 20 MiB PGP Signature | Build Log
-
-
x86
This version requires Android 6.0 or newer.
It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.
Permissions
-
view network connectionsAllows the app to view information about network connections such as which networks exist and are connected.
-
access Do Not DisturbAllows the app to read and write Do Not Disturb configuration.
-
pair with Bluetooth devicesAllows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
-
connect to paired Bluetooth devicesAllows the app to connect to paired Bluetooth devices
-
take pictures and videosThis app can take pictures and record videos using the camera while the app is in use.
-
allow Wi-Fi Multicast receptionAllows the app to receive packets sent to all devices on a Wi-Fi network using multicast addresses, not just your phone. It uses more power than the non-multicast mode.
-
run foreground serviceAllows the app to make use of foreground services.
-
run foreground service with the type "camera"Allows the app to make use of foreground services with the type "camera"
-
run foreground service with the type "dataSync"Allows the app to make use of foreground services with the type "dataSync"
-
run foreground service with the type "microphone"Allows the app to make use of foreground services with the type "microphone"
-
run foreground service with the type "phoneCall"Allows the app to make use of foreground services with the type "phoneCall"
-
have full network accessAllows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
-
change your audio settingsAllows the app to modify global audio settings such as volume and which speaker is used for output.
-
show notificationsAllows the app to show notifications
-
read your contactsAllows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
-
android.permission.READ_LOGS
-
read phone numbersAllows the app to access the phone numbers of the device.
-
read phone status and identityAllows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
-
run at startupAllows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
-
record audioThis app can record audio using the microphone while the app is in use.
-
display notifications as full screen activities on a locked deviceAllows the app to display notifications as full screen activities on a locked device
-
control vibrationAllows the app to control the vibrator.
-
prevent phone from sleepingAllows the app to prevent the phone from going to sleep.
-
org.simlar.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 20 MiB PGP Signature | Build Log
-
-
armeabi-v7a
This version requires Android 6.0 or newer.
It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.
Permissions
-
view network connectionsAllows the app to view information about network connections such as which networks exist and are connected.
-
access Do Not DisturbAllows the app to read and write Do Not Disturb configuration.
-
pair with Bluetooth devicesAllows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
-
connect to paired Bluetooth devicesAllows the app to connect to paired Bluetooth devices
-
take pictures and videosThis app can take pictures and record videos using the camera while the app is in use.
-
allow Wi-Fi Multicast receptionAllows the app to receive packets sent to all devices on a Wi-Fi network using multicast addresses, not just your phone. It uses more power than the non-multicast mode.
-
run foreground serviceAllows the app to make use of foreground services.
-
run foreground service with the type "camera"Allows the app to make use of foreground services with the type "camera"
-
run foreground service with the type "dataSync"Allows the app to make use of foreground services with the type "dataSync"
-
run foreground service with the type "microphone"Allows the app to make use of foreground services with the type "microphone"
-
run foreground service with the type "phoneCall"Allows the app to make use of foreground services with the type "phoneCall"
-
have full network accessAllows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
-
change your audio settingsAllows the app to modify global audio settings such as volume and which speaker is used for output.
-
show notificationsAllows the app to show notifications
-
read your contactsAllows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
-
android.permission.READ_LOGS
-
read phone numbersAllows the app to access the phone numbers of the device.
-
read phone status and identityAllows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
-
run at startupAllows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
-
record audioThis app can record audio using the microphone while the app is in use.
-
display notifications as full screen activities on a locked deviceAllows the app to display notifications as full screen activities on a locked device
-
control vibrationAllows the app to control the vibrator.
-
prevent phone from sleepingAllows the app to prevent the phone from going to sleep.
-
org.simlar.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 19 MiB PGP Signature | Build Log
-
-
arm64-v8a
This version requires Android 6.0 or newer.
It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.
Permissions
-
view network connectionsAllows the app to view information about network connections such as which networks exist and are connected.
-
access Do Not DisturbAllows the app to read and write Do Not Disturb configuration.
-
pair with Bluetooth devicesAllows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
-
connect to paired Bluetooth devicesAllows the app to connect to paired Bluetooth devices
-
take pictures and videosThis app can take pictures and record videos using the camera while the app is in use.
-
allow Wi-Fi Multicast receptionAllows the app to receive packets sent to all devices on a Wi-Fi network using multicast addresses, not just your phone. It uses more power than the non-multicast mode.
-
run foreground serviceAllows the app to make use of foreground services.
-
run foreground service with the type "camera"Allows the app to make use of foreground services with the type "camera"
-
run foreground service with the type "dataSync"Allows the app to make use of foreground services with the type "dataSync"
-
run foreground service with the type "microphone"Allows the app to make use of foreground services with the type "microphone"
-
run foreground service with the type "phoneCall"Allows the app to make use of foreground services with the type "phoneCall"
-
have full network accessAllows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
-
change your audio settingsAllows the app to modify global audio settings such as volume and which speaker is used for output.
-
show notificationsAllows the app to show notifications
-
read your contactsAllows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
-
android.permission.READ_LOGS
-
read phone numbersAllows the app to access the phone numbers of the device.
-
read phone status and identityAllows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
-
run at startupAllows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
-
record audioThis app can record audio using the microphone while the app is in use.
-
display notifications as full screen activities on a locked deviceAllows the app to display notifications as full screen activities on a locked device
-
control vibrationAllows the app to control the vibrator.
-
prevent phone from sleepingAllows the app to prevent the phone from going to sleep.
-
org.simlar.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 20 MiB PGP Signature | Build Log
-
-
x86
This version requires Android 6.0 or newer.
It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.
Permissions
-
view network connectionsAllows the app to view information about network connections such as which networks exist and are connected.
-
access Do Not DisturbAllows the app to read and write Do Not Disturb configuration.
-
pair with Bluetooth devicesAllows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
-
connect to paired Bluetooth devicesAllows the app to connect to paired Bluetooth devices
-
take pictures and videosThis app can take pictures and record videos using the camera while the app is in use.
-
allow Wi-Fi Multicast receptionAllows the app to receive packets sent to all devices on a Wi-Fi network using multicast addresses, not just your phone. It uses more power than the non-multicast mode.
-
run foreground serviceAllows the app to make use of foreground services.
-
run foreground service with the type "camera"Allows the app to make use of foreground services with the type "camera"
-
run foreground service with the type "dataSync"Allows the app to make use of foreground services with the type "dataSync"
-
run foreground service with the type "microphone"Allows the app to make use of foreground services with the type "microphone"
-
run foreground service with the type "phoneCall"Allows the app to make use of foreground services with the type "phoneCall"
-
have full network accessAllows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
-
change your audio settingsAllows the app to modify global audio settings such as volume and which speaker is used for output.
-
show notificationsAllows the app to show notifications
-
read your contactsAllows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
-
android.permission.READ_LOGS
-
read phone numbersAllows the app to access the phone numbers of the device.
-
read phone status and identityAllows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
-
run at startupAllows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
-
record audioThis app can record audio using the microphone while the app is in use.
-
display notifications as full screen activities on a locked deviceAllows the app to display notifications as full screen activities on a locked device
-
control vibrationAllows the app to control the vibrator.
-
prevent phone from sleepingAllows the app to prevent the phone from going to sleep.
-
org.simlar.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 20 MiB PGP Signature | Build Log
-
-
armeabi-v7a
This version requires Android 6.0 or newer.
It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.
Permissions
-
view network connectionsAllows the app to view information about network connections such as which networks exist and are connected.
-
access Do Not DisturbAllows the app to read and write Do Not Disturb configuration.
-
pair with Bluetooth devicesAllows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
-
connect to paired Bluetooth devicesAllows the app to connect to paired Bluetooth devices
-
take pictures and videosThis app can take pictures and record videos using the camera while the app is in use.
-
allow Wi-Fi Multicast receptionAllows the app to receive packets sent to all devices on a Wi-Fi network using multicast addresses, not just your phone. It uses more power than the non-multicast mode.
-
run foreground serviceAllows the app to make use of foreground services.
-
run foreground service with the type "camera"Allows the app to make use of foreground services with the type "camera"
-
run foreground service with the type "dataSync"Allows the app to make use of foreground services with the type "dataSync"
-
run foreground service with the type "microphone"Allows the app to make use of foreground services with the type "microphone"
-
run foreground service with the type "phoneCall"Allows the app to make use of foreground services with the type "phoneCall"
-
have full network accessAllows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
-
change your audio settingsAllows the app to modify global audio settings such as volume and which speaker is used for output.
-
show notificationsAllows the app to show notifications
-
read your contactsAllows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
-
android.permission.READ_LOGS
-
read phone numbersAllows the app to access the phone numbers of the device.
-
read phone status and identityAllows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
-
run at startupAllows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
-
record audioThis app can record audio using the microphone while the app is in use.
-
display notifications as full screen activities on a locked deviceAllows the app to display notifications as full screen activities on a locked device
-
control vibrationAllows the app to control the vibrator.
-
prevent phone from sleepingAllows the app to prevent the phone from going to sleep.
-
org.simlar.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 19 MiB PGP Signature | Build Log
-