Tella
Tella is a free, open-source security app for Android. Encrypt and hide files on your device. It has 115 GitHub stars and is released under the Apache-2.0 license, and you can install it from F-Droid and Google Play.
github.com/Horizontal-org/Tella-Android (opens in a new tab)
Data as of from the GitHub API and the F-Droid index; description from the project's repository or F-Droid listing. Report an error
About Tella
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.
Privacy and F-Droid
F-Droid builds Tella from its published source code and flags anti-features such as ads, tracking or reliance on non-free services.
No anti-features flagged on the latest F-Droid build.
Screenshots
Screenshots from the app's F-Droid listing.
Similar apps
More open-source password managers and authenticators
KeePassVault
aivanovski/keepassvault
Client app for KeePass databases.
Active · last commit Oct 20, 2026
Password managers & securityAndroid
androidcrypt
jmccoy600/androidCrypt
Mount and access VeraCrypt encrypted volumes on Android.
Active · last commit Aug 17, 2026
Password managers & securityAndroid
Password Monitor
StellarSand/Password-Monitor
Ensure your password safety by scanning for potential breaches.
Active · last commit Oct 12, 2026
Password managers & securityAndroid
Passman
nextcloud/passman-android
Allow you to manage the credentials stored in your Nextcloud Passman app.
Active · last commit Oct 28, 2026
OfficialPassword managers & securityAndroid
PGPony
norsehorse-dev/PGPonyAndroid
OpenPGP encryption with hardware security keys and password-store support.
Active · last commit Oct 27, 2026
Password managers & securityAndroid
Ente Locker
ente/ente
Store & share important documents privately, and pass them on in emergencies.
Active · last commit Oct 28, 2026
Password managers & securityAndroidiOS
Is Tella free and open source?
Yes. Tella's source code is public on GitHub under the Apache-2.0 license, which is OSI-approved or FSF-free. F-Droid, which builds it from source, flags no anti-features such as ads or tracking on its latest build.
How do I install Tella?
You can install Tella from F-Droid (package org.hzontal.tellaFOSS) and from Google Play; the links are on this page. Its GitHub repository also publishes releases (latest: v3.4.1(260)).
Is Tella still maintained?
The repository's most recent commit was on Oct 20, 2026. Its F-Droid listing was last updated on Oct 12, 2026. appsgit only lists apps whose repository had a commit in the last six months.