Tella

Encrypt and hide files on your device

New in version 3.1.0

- Replaced geo-location provider.
- Solved crash on camera that was affecting some models of Pixel phones.
- Fixed import and delete original bug that prevented the original file from being erased from the device in some cases.
- Fixed screen security issue on onboarding (some screens were not hidden).
- Corrected capitalization of buttons.
- Fixed geo-location permission flow and solved a bug that prevented the geo-location flow from continuing the first time permission was granted.
- Added opt

In challenging environments with limited or no internet connectivity or in the face of repression Tella makes it easier and safer to document events, whether that’s violence, human rights violations, corruption, or electoral fraud.
ENCRYPTION: All of the content and data stored in Tella are encrypted. This means that unless the app is unlocked, all the data within Tella will remain inaccessible.
FILE MANAGEMENT: Take photos, videos, or audio recordings directly in Tella, or import documents from your phone, and easily organize your files in folders.
CAMOUFLAGE: Change the app icon and name to a seemingly harmless one, such as a calculator or a camera.
QUICK DELETE: In just a few seconds, delete all the sensitive data and files stored in Tella.
DATA-COLLECTION: Groups and organizations can collect data through forms and surveys, and received the data directly on their server.

Donate

wearehorizontal.org/donate.html

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 3.1.0 (242) suggested Added on Jun 10, 2026

arm64-v8a armeabi-v7a x86 x86_64

This version requires Android 5.0 or newer.

It is built and signed by the original developer, 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.
- access Do Not Disturb
  
  Allows the app to read and write Do Not Disturb configuration.
- 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.
- android.permission.AUTHENTICATE_ACCOUNTS
- take pictures and videos
  
  This app can take pictures and record videos using the camera while the app is in use.
- connect and disconnect from Wi-Fi
  
  Allows the app to connect to and disconnect from Wi-Fi access points and to make changes to device configuration for Wi-Fi networks.
- 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
- interact with nearby Wi-Fi devices
  
  Allows the app to advertise, connect, and determine the relative position of nearby Wi-Fi devices
- control Near Field Communication
  
  Allows the app to communicate with Near Field Communication (NFC) tags, cards, and readers.
- show notifications
  
  Allows the app to show notifications
- read the contents of your shared storage
  
  Allows the app to read the contents of your shared storage.
- 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.
- request delete packages
  
  Allows an application to request deletion of packages.
- use biometric hardware
  
  Allows the app to use biometric hardware for authentication
- android.permission.USE_CREDENTIALS
- use fingerprint hardware
  
  Allows the app to use fingerprint hardware for authentication
- prevent phone from sleeping
  
  Allows the app to prevent the phone from going to sleep.
- modify or delete the contents of your shared storage
  
  Allows the app to write the contents of your shared storage.
- org.hzontal.tellaFOSS.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 33 MiB PGP Signature | Build Log

New in version 3.0.0

- Implemented Nearby Sharing: Nearby Sharing lets users securely share files in physical proximity. Nearby Sharing is fully offline, available across platforms and devices, and assures end-to-end encryption. https://tella-app.org/nearby-sharing/
- Implemented security fixes detected by our most recent security audit (to be published soon!).
- New languages support: Ukrainian.
- Bug fixes and minor improvements.

Full release notes: https://tella-app.org/releases

Version 3.0.0 (237) - Added on May 23, 2026

arm64-v8a armeabi-v7a x86 x86_64

This version requires Android 5.0 or newer.

It is built and signed by the original developer, 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.
- android.permission.AUTHENTICATE_ACCOUNTS
- take pictures and videos
  
  This app can take pictures and record videos using the camera while the app is in use.
- connect and disconnect from Wi-Fi
  
  Allows the app to connect to and disconnect from Wi-Fi access points and to make changes to device configuration for Wi-Fi networks.
- 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
- interact with nearby Wi-Fi devices
  
  Allows the app to advertise, connect, and determine the relative position of nearby Wi-Fi devices
- control Near Field Communication
  
  Allows the app to communicate with Near Field Communication (NFC) tags, cards, and readers.
- show notifications
  
  Allows the app to show notifications
- read the contents of your shared storage
  
  Allows the app to read the contents of your shared storage.
- 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.
- request delete packages
  
  Allows an application to request deletion of packages.
- use biometric hardware
  
  Allows the app to use biometric hardware for authentication
- android.permission.USE_CREDENTIALS
- use fingerprint hardware
  
  Allows the app to use fingerprint hardware for authentication
- prevent phone from sleeping
  
  Allows the app to prevent the phone from going to sleep.
- modify or delete the contents of your shared storage
  
  Allows the app to write the contents of your shared storage.
- org.hzontal.tellaFOSS.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 33 MiB PGP Signature | Build Log

New in version 2.20.2

This version is based on Tella Android 2.20.2 and includes the following features:

- Big refactor (including adding product flavors) to be able to merge Tella Android and Tella FOSS codebases into a single one.
- Implemented the Nextcloud server connection that allows Tella users to upload the data they collect directly to Nextcloud. Read more here about the connection.
- New Languages support: Bengali, Ndau, Azerbaijani, Chinese, Mizo
- Improved document support:
Added thumbnail placeholders

Version 2.20.2 (233) - Added on Apr 24, 2026

arm64-v8a armeabi-v7a x86 x86_64

This version requires Android 5.0 or newer.

It is built and signed by the original developer, 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.
- android.permission.AUTHENTICATE_ACCOUNTS
- take pictures and videos
  
  This app can take pictures and record videos using the camera while the app is in use.
- connect and disconnect from Wi-Fi
  
  Allows the app to connect to and disconnect from Wi-Fi access points and to make changes to device configuration for Wi-Fi networks.
- 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
- control Near Field Communication
  
  Allows the app to communicate with Near Field Communication (NFC) tags, cards, and readers.
- show notifications
  
  Allows the app to show notifications
- read the contents of your shared storage
  
  Allows the app to read the contents of your shared storage.
- 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.
- use biometric hardware
  
  Allows the app to use biometric hardware for authentication
- android.permission.USE_CREDENTIALS
- use fingerprint hardware
  
  Allows the app to use fingerprint hardware for authentication
- prevent phone from sleeping
  
  Allows the app to prevent the phone from going to sleep.
- modify or delete the contents of your shared storage
  
  Allows the app to write the contents of your shared storage.
- org.hzontal.tellaFOSS.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 29 MiB PGP Signature | Build Log

Donate

Versions

Find Apps