Encrypt and hide files on your device
About this app
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.
Licensed under Apache-2.0.
What's New in v3.1.0
Imported from the F-Droid repository index.
- - 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.
Version history
Jun 10, 2026 · 33.3 MB · Android API 21–36 · code 242
Imported from the F-Droid repository index.
- - 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.
SHA-256 18d1c857755cf7b9c0f2d74750df005fe3fc9085eb7aa59ca7bf7be48ab8a13f
May 23, 2026 · 33.4 MB · Android API 21–36 · code 237
Imported from the F-Droid repository index.
- - 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
SHA-256 fe1aeeceff710d1caa8e1154be65c5cb5bf4beaeb91107bf3950fcd3a21c5a40
Apr 24, 2026 · 29.5 MB · Android API 21–36 · code 233
Imported from the F-Droid repository index.
- 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
SHA-256 e089cc9a8099fdaf18099c2069921f7ed8a7faaa85a23fdbb362cf533d3fbf1d
Will it run on your device?
92%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be org.hzontal.tellaFOSS is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 3.0.0 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Tella first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Tella, and a listing is removed when the evidence for it stops holding up.
Get Tella
Every source we list for org.hzontal.tellaFOSS is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
18d1c857755cf7b9c0f2d74750df005fe3fc9085eb7aa59ca7bf7be48ab8a13f
Signing certificate
0f98d162b443e71de141a93aec27c6d5acaa725dba4c3fca97457258c193a729
Permissions Required
What each permission lets Tella do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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