Trigger apps to protect your privacy when in anxious or panic situations
About this app
Ripple is a "panic button" that can send it's trigger message to any app that is a "panic responder". Such apps can do things like lock, disguise themselves, delete private data, send an emergency message, and more. It is meant for situations where there is time to react, but where users need to be sure it is not mistakenly set off.
This is a BETA version of this app! We are working now to add support to as many other apps as possible. ChatSecure, Orweb, Umbrella, and Zom already have support, these apps are coming soon: Courier, PanicButton, OpenKeychain, Orfox, SMSSecure, StoryMaker.
Here are two example scenarios:
* An organization gets regularly raided by the security forces, who search all of the computers and mobile devices on the premises. The organization usually has at least a minute or two of warning before a raid starts. They need a very reliable way to trigger wiping all of the data from the sensitive apps.
* An aid worker has lots of sensitive data about people on their device. They regularly sync that data to a secure, central database. Occasionally, the aid worker has to leave the country on very short notice. The border guards regularly download the entire contents of mobile devices of people crossing through. While waiting in line at the border, the aid worker sees the border guards seizing people's devices, and then remembers all the data on the device, so she unlocks the phone and hits the wipe trigger, which wipes all sensitive apps from the device. When the aid worker returns to the central office, the device is again synced up with the central database.
This project was started as part of the T2 Panic work. Read more about it here: https://guardianproject.info/tag/panic
Don’t see your language? Join us and help translate the app: https://hosted.weblate.org/projects/guardianproject/ripple/ https://hosted.weblate.org/projects/guardianproject/ripple-metadata/
***Learn More***
★ ABOUT US: Guardian Project is a group of developers that make secure mobile apps and open-source code for a better tomorrow ★ OUR WEBSITE: https://GuardianProject.info ★ ON TWITTER: https://twitter.com/guardianproject ★ FREE SOFTWARE: Ripple is free software. You can take a look at our source code, or contribute to help make Ripple even better: https://github.com/guardianproject/ripple ★ MESSAGE US: Are we missing your favorite feature? Found an annoying bug? Please tell us! We’d love to hear from you. Send us an email: support@guardianproject.info or find us in our chat room https://guardianproject.info/contact
Licensed under GPL-3.0-or-later, by Guardian Project.
What's New in v0.3.2
Imported from the F-Droid repository index.
Version history
Apr 19, 2026 · 2.2 MB · Android API 14–34 · code 170
Imported from the F-Droid repository index.
SHA-256 c94d8aec3c47ad090933116bac0b3d35699bda11c98eaf0a963ec713f0dcbbe9
Oct 27, 2024 · 2.1 MB · Android API 14–34 · code 168
Imported from the F-Droid repository index.
SHA-256 a933eba918cacf6e37a4f2d45188ab6d1abb64530031bd3d29f375e90c232b3c
Oct 17, 2024 · 2.1 MB · Android API 14–34 · code 164
Imported from the F-Droid repository index.
- * Fix crash on recent Android versions
- * Added translations: Basque, Farsi, Indonesian, Portuguese of Portugal, Ukrainian
SHA-256 eac6f31f454b67bd536fa47d6af4ea28228f109f795beccd538e66095892127f
Will it run on your device?
73%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
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 info.guardianproject.ripple 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, 0.3.1 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Ripple: respond when panicking 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 Ripple: respond when panicking, and a listing is removed when the evidence for it stops holding up.
Get Ripple: respond when panicking
Every source we list for info.guardianproject.ripple 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
c94d8aec3c47ad090933116bac0b3d35699bda11c98eaf0a963ec713f0dcbbe9
Signing certificate
927f7e38b6acbecd84e02dace33efa9a7a2f0979750f28f585688ee38b3a4e28
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.
More Security Privacy apps
More from F-Droid
Report a problem with this listing
A listing is only as good as its corrections. If a source is broken, a signature looks wrong, or this app should not be here, tell the moderation team.