Time travelling audio recorder for Android.
About this app
Continuously record audio for retrieval at a later time.
Unless saved, recordings are deleted on a rolling basis.
• record harassment and bullying (even when you didn't anticipated them)
• save important pieces of information (phone numbers / passwords / instructions)
• record cute/funny moments
• prove that someone said (or didn't say) something
Limitations
The app employs a range of tricks to reduce battery usage but it's still draining quite a bit. You'll have to check your device to see how it affects your battery.
Battery drain is comparable to having constant audio playback.
Licensed under GPL-3.0-only, by Marek Rogalski.
What's New in v2.0.0
Imported from the F-Droid repository index.
- • Bumped the minimum Android SDK level to 30 (Android 11)
- • Fixed a crash when disabling & re-enabling listening on recent devices
- • Fixed the lag issue that prevented the app from showing current recording time after opening the app
- • Removed obsolete links & references to Google Play
Version history
Jun 11, 2025 · 1.7 MB · Android API 30–34 · code 15
Imported from the F-Droid repository index.
- • Bumped the minimum Android SDK level to 30 (Android 11)
- • Fixed a crash when disabling & re-enabling listening on recent devices
- • Fixed the lag issue that prevented the app from showing current recording time after opening the app
- • Removed obsolete links & references to Google Play
SHA-256 ac64cfcfd8ddc626e4e958011ab748f7d24a0e07411223d832fa28da319a8bd1
Oct 4, 2021 · 1.5 MB · Android API 14–19 · code 14
Imported from the F-Droid repository index.
SHA-256 932650d3fb6869ef0005d39c8c958aae275fc82ca15f699404a2dea44af8e0d2
Oct 31, 2014 · 1.5 MB · Android API 14–19 · code 13
Imported from the F-Droid repository index.
SHA-256 b2d32e8ef55586aea772bc6cb2f36dd65fb09728f73fea55a6b8e644750eb5f5
Will it run on your device?
55%
- Targets newer Android builds, so legacy devices may be excluded.
- 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 eu.mrogalski.saidit 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, 1.3.39 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Echo 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 Echo, and a listing is removed when the evidence for it stops holding up.
Get Echo
Every source we list for eu.mrogalski.saidit 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
ac64cfcfd8ddc626e4e958011ab748f7d24a0e07411223d832fa28da319a8bd1
Signing certificate
cccdbf794b502d7fb908891ca1d607671750bea3f5061c3030a6a7d2d9411a51
Permissions Required
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.
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.