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Threema Libre

Secure and private messaging
NOTE: A Threema Shop license is required, please visit: https://shop.threema.ch to get one.

Threema is the world’s best-selling secure messenger and keeps your data out of the hands of hackers, corporations, and governments. The service can be used completely anonymously. Threema is open source and offers every feature one would expect from a state-of-the-art instant messenger. The app also allows you to make end-to-end encrypted voice, video, and group calls. Using the desktop app and the web client, you can also use Threema from your desktop.

In contrast to the version distributed via Google Play, Threema Libre contains no proprietary libraries / components (like Google Play Services).

PRIVACY AND ANONYMITY

Threema is designed from the ground up to generate as little data on servers as possible. Group memberships and contact lists are managed on your device only and never stored on our servers. Messages are immediately deleted after they have been delivered. Local files are stored encrypted on your mobile phone or tablet. All this effectively prevents the collection and misuse of your personal information, including metadata. Threema is fully compliant with the European privacy legislation (GDPR).

ROCK-SOLID ENCRYPTION

Threema end-to-end encrypts all your communication, including messages, voice and video calls, group chats, files, and even status messages. Only the intended recipient, and nobody else, can read your messages. Threema uses the trusted open source NaCl cryptography library for encryption. The encryption keys are generated and safely stored on the users’ devices to prevent backdoor access or copies.

COMPREHENSIVE FEATURES

Threema is not only an encrypted and private messenger but also versatile and feature-rich.

· Write text and send voice messages
· Edit and delete sent messages on the recipient’s end
· Make voice, video and group calls
· Share videos pictures and locations
· Send any type of file (pdf animated gif, mp3, doc, zip, etc.)
· Use the desktop app or the web client to chat from your computer
· Create groups
· Conduct polls with the poll feature
· Choose between a dark and a light theme
· Quickly and silently reply with the unique agree/disagree feature
· Verify the identity of a contact by scanning their personal QR code
· Use Threema as anonymous instant messaging tool
· Synchronize your contacts (optional)

SERVERS IN SWITZERLAND

All our servers are located in Switzerland, and we develop our software in-house.

FULL ANONYMITY

Each Threema user receives a random Threema ID for identification. A phone number or email address is not required to use Threema. This unique feature allows you to use Threema completely anonymously – no need to give up private information or to open an account.

OPEN SOURCE AND AUDITS

The source code of the Threema app is open for everyone to review. On top of that, renowned experts are regularly commissioned to conduct systematic security audits of Threema’s code.

NO ADS, NO TRACKERS

Threema is not financed by advertising and does not collect user data.

SUPPORT / CONTACT

For questions or problems please consult our FAQs: https://threema.ch/en/faq

Anti-Features

This app has features you may not like. Learn more!

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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
  • Version 5.6.1l (1013) - Added on Nov 25, 2024

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 5.0 or newer.

    It is built by F-Droid and guaranteed to correspond to this source tarball.

    Permissions
    • access approximate location only in the foreground
      This app can get your approximate location from location services while the app is in use. Location services for your device must be turned on for the app to get location.
    • access precise location only in the foreground
      This app can get your precise location from location services while the app is in use. Location services for your device must be turned on for the app to get location. This may increase battery usage.
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • view Wi-Fi connections
      Allows the app to view information about Wi-Fi networking, such as whether Wi-Fi is enabled and name of connected Wi-Fi devices.
    • answer phone calls
      Allows the app to answer an incoming phone call.
    • android.permission.AUTHENTICATE_ACCOUNTS
    • pair with Bluetooth devices
      Allows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
      (11)
    • connect to paired Bluetooth devices
      Allows the app to connect to paired Bluetooth devices
    • directly call phone numbers
      Allows the app to call phone numbers without your intervention. This may result in unexpected charges or calls. Note that this doesn't allow the app to call emergency numbers. Malicious apps may cost you money by making calls without your confirmation.
    • take pictures and videos
      This app can take pictures and record videos using the camera while the app is in use.
    • run foreground service
      Allows the app to make use of foreground services.
    • 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 "mediaPlayback"
      Allows the app to make use of foreground services with the type "mediaPlayback"
    • 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 "remoteMessaging"
      Allows the app to make use of foreground services with the type "remoteMessaging"
    • find accounts on the device
      Allows the app to get the list of accounts known by the phone. This may include any accounts created by applications you have installed.
    • have full network access
      Allows 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.
    • android.permission.MANAGE_ACCOUNTS
    • change your audio settings
      Allows the app to modify global audio settings such as volume and which speaker is used for output.
    • show notifications
      Allows the app to show notifications
    • read your contacts
      Allows 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.
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
      (12L)
    • read image files from shared storage
      Allows the app to read image files from your shared storage.
    • read video files from shared storage
      Allows the app to read video files from your shared storage.
    • read user selected image and video files from shared storage
      Allows the app to read image and video files that you select from your shared storage.
    • read phone status and identity
      Allows 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.
    • read sync settings
      Allows the app to read the sync settings for an account. For example, this can determine whether the People app is synced with an account.
    • run at startup
      Allows 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 audio
      This app can record audio using the microphone while the app is in use.
    • ask to ignore battery optimizations
      Allows an app to ask for permission to ignore battery optimizations for that app.
    • use biometric hardware
      Allows the app to use biometric hardware for authentication
    • use fingerprint hardware
      Allows the app to use fingerprint hardware for authentication
    • display notifications as full screen activities on a locked device
      Allows the app to display notifications as full screen activities on a locked device
    • control vibration
      Allows the app to control the vibrator.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • modify your contacts
      Allows the app to modify the data about your contacts stored on your phone. This permission allows apps to delete contact data.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
      (10)
    • toggle sync on and off
      Allows an app to modify the sync settings for an account. For example, this can be used to enable sync of the People app with an account.
    • ch.threema.app.libre.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
    • install shortcuts
      Allows an application to add Homescreen shortcuts without user intervention.
    • com.huawei.android.launcher.permission.CHANGE_BADGE
    • com.huawei.android.launcher.permission.READ_SETTINGS
    • com.huawei.android.launcher.permission.WRITE_SETTINGS
    • com.sonymobile.home.permission.PROVIDER_INSERT_BADGE

    Download APK 61 MiB PGP Signature | Build Log

  • Version 5.6.0l (1012) - Added on Nov 14, 2024

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 5.0 or newer.

    It is built by F-Droid and guaranteed to correspond to this source tarball.

    Permissions
    • access approximate location only in the foreground
      This app can get your approximate location from location services while the app is in use. Location services for your device must be turned on for the app to get location.
    • access precise location only in the foreground
      This app can get your precise location from location services while the app is in use. Location services for your device must be turned on for the app to get location. This may increase battery usage.
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • view Wi-Fi connections
      Allows the app to view information about Wi-Fi networking, such as whether Wi-Fi is enabled and name of connected Wi-Fi devices.
    • answer phone calls
      Allows the app to answer an incoming phone call.
    • android.permission.AUTHENTICATE_ACCOUNTS
    • pair with Bluetooth devices
      Allows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
      (11)
    • connect to paired Bluetooth devices
      Allows the app to connect to paired Bluetooth devices
    • directly call phone numbers
      Allows the app to call phone numbers without your intervention. This may result in unexpected charges or calls. Note that this doesn't allow the app to call emergency numbers. Malicious apps may cost you money by making calls without your confirmation.
    • take pictures and videos
      This app can take pictures and record videos using the camera while the app is in use.
    • run foreground service
      Allows the app to make use of foreground services.
    • 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 "mediaPlayback"
      Allows the app to make use of foreground services with the type "mediaPlayback"
    • 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 "remoteMessaging"
      Allows the app to make use of foreground services with the type "remoteMessaging"
    • find accounts on the device
      Allows the app to get the list of accounts known by the phone. This may include any accounts created by applications you have installed.
    • have full network access
      Allows 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.
    • android.permission.MANAGE_ACCOUNTS
    • change your audio settings
      Allows the app to modify global audio settings such as volume and which speaker is used for output.
    • show notifications
      Allows the app to show notifications
    • read your contacts
      Allows 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.
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
      (12L)
    • read image files from shared storage
      Allows the app to read image files from your shared storage.
    • read video files from shared storage
      Allows the app to read video files from your shared storage.
    • read user selected image and video files from shared storage
      Allows the app to read image and video files that you select from your shared storage.
    • read phone status and identity
      Allows 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.
    • read sync settings
      Allows the app to read the sync settings for an account. For example, this can determine whether the People app is synced with an account.
    • run at startup
      Allows 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 audio
      This app can record audio using the microphone while the app is in use.
    • ask to ignore battery optimizations
      Allows an app to ask for permission to ignore battery optimizations for that app.
    • use biometric hardware
      Allows the app to use biometric hardware for authentication
    • use fingerprint hardware
      Allows the app to use fingerprint hardware for authentication
    • display notifications as full screen activities on a locked device
      Allows the app to display notifications as full screen activities on a locked device
    • control vibration
      Allows the app to control the vibrator.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • modify your contacts
      Allows the app to modify the data about your contacts stored on your phone. This permission allows apps to delete contact data.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
      (10)
    • toggle sync on and off
      Allows an app to modify the sync settings for an account. For example, this can be used to enable sync of the People app with an account.
    • ch.threema.app.libre.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
    • install shortcuts
      Allows an application to add Homescreen shortcuts without user intervention.
    • com.huawei.android.launcher.permission.CHANGE_BADGE
    • com.huawei.android.launcher.permission.READ_SETTINGS
    • com.huawei.android.launcher.permission.WRITE_SETTINGS
    • com.sonymobile.home.permission.PROVIDER_INSERT_BADGE

    Download APK 61 MiB PGP Signature | Build Log

  • Version 5.5.1l (998) - Added on Oct 03, 2024

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 5.0 or newer.

    It is built by F-Droid and guaranteed to correspond to this source tarball.

    Permissions
    • access approximate location only in the foreground
      This app can get your approximate location from location services while the app is in use. Location services for your device must be turned on for the app to get location.
    • access precise location only in the foreground
      This app can get your precise location from location services while the app is in use. Location services for your device must be turned on for the app to get location. This may increase battery usage.
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • view Wi-Fi connections
      Allows the app to view information about Wi-Fi networking, such as whether Wi-Fi is enabled and name of connected Wi-Fi devices.
    • answer phone calls
      Allows the app to answer an incoming phone call.
    • android.permission.AUTHENTICATE_ACCOUNTS
    • pair with Bluetooth devices
      Allows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
      (11)
    • connect to paired Bluetooth devices
      Allows the app to connect to paired Bluetooth devices
    • directly call phone numbers
      Allows the app to call phone numbers without your intervention. This may result in unexpected charges or calls. Note that this doesn't allow the app to call emergency numbers. Malicious apps may cost you money by making calls without your confirmation.
    • take pictures and videos
      This app can take pictures and record videos using the camera while the app is in use.
    • run foreground service
      Allows the app to make use of foreground services.
    • find accounts on the device
      Allows the app to get the list of accounts known by the phone. This may include any accounts created by applications you have installed.
    • have full network access
      Allows 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.
    • android.permission.MANAGE_ACCOUNTS
    • change your audio settings
      Allows the app to modify global audio settings such as volume and which speaker is used for output.
    • show notifications
      Allows the app to show notifications
    • read your contacts
      Allows 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.
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
      (12L)
    • read image files from shared storage
      Allows the app to read image files from your shared storage.
    • read video files from shared storage
      Allows the app to read video files from your shared storage.
    • read phone status and identity
      Allows 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.
    • read sync settings
      Allows the app to read the sync settings for an account. For example, this can determine whether the People app is synced with an account.
    • run at startup
      Allows 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 audio
      This app can record audio using the microphone while the app is in use.
    • ask to ignore battery optimizations
      Allows an app to ask for permission to ignore battery optimizations for that app.
    • use biometric hardware
      Allows the app to use biometric hardware for authentication
    • use fingerprint hardware
      Allows the app to use fingerprint hardware for authentication
    • display notifications as full screen activities on a locked device
      Allows the app to display notifications as full screen activities on a locked device
    • control vibration
      Allows the app to control the vibrator.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • modify your contacts
      Allows the app to modify the data about your contacts stored on your phone. This permission allows apps to delete contact data.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
      (10)
    • toggle sync on and off
      Allows an app to modify the sync settings for an account. For example, this can be used to enable sync of the People app with an account.
    • ch.threema.app.libre.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
    • install shortcuts
      Allows an application to add Homescreen shortcuts without user intervention.
    • com.huawei.android.launcher.permission.CHANGE_BADGE
    • com.huawei.android.launcher.permission.READ_SETTINGS
    • com.huawei.android.launcher.permission.WRITE_SETTINGS
    • com.sonymobile.home.permission.PROVIDER_INSERT_BADGE

    Download APK 59 MiB PGP Signature | Build Log