Simplifies comparing photos of tamper-evident seals using your eyes
About this app
The concept of "blink comparison" method is simple - the app allows you to quickly switch pictures without delay so you can see the differences.
"Blink comparison" method uses high efficiency pattern recognition by human eyes, to permit quick verification between a reference picture and an actual one being taken on the spot. For example, in the goal of detecting tampering in high contrast nail polish tamper-evident seals.
📋 Features * Free and Open Source software (FOSS) * Support for various platforms and devices (currently Android only) * Add and store reference pictures in the app or take a photo on the spot * Encrypting images (optional), making it harder to steal or replacement * Compare a reference image with the one just taken using "blink comparison" method * Helps to take a compared photo in the correct position, at the correct angle, lighting and distance * Material Design 3 * Night theme * Responsive UI for different devices form factors
For more information, please see here: https://github.com/proninyaroslav/blink-comparison/blob/HEAD/README.md Privacy Policy: https://github.com/proninyaroslav/blink-comparison/blob/HEAD/PRIVACY.md
Licensed under GPL-3.0-or-later, by Yaroslav Pronin.
What's New in v1.2.1
Imported from the F-Droid repository index.
Version history
Oct 27, 2024 · 12.3 MB · Android API 21–34 · code 5073
Imported from the F-Droid repository index.
SHA-256 609aba5fc5d6d79b61f51279d53d802650bca2801da60d1102f25c9f9054990c
Oct 27, 2024 · 12.2 MB · Android API 21–34 · code 5072
Imported from the F-Droid repository index.
SHA-256 765a2bcc9f422096119ba02e0ea0484bfb5d44ad4da5072bc5df1347b2a649ab
Oct 27, 2024 · 11.9 MB · Android API 21–34 · code 5071
Imported from the F-Droid repository index.
SHA-256 19c2aa7a6cfa7b06128e35acc979010e57788510373cb9634891429c9fefda07
Will it run on your device?
87%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
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.proninyaroslav.blink_comparison 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, 1.2.1 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Blink Comparison 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 Blink Comparison, and a listing is removed when the evidence for it stops holding up.
Get Blink Comparison
Every source we list for org.proninyaroslav.blink_comparison 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
609aba5fc5d6d79b61f51279d53d802650bca2801da60d1102f25c9f9054990c
Signing certificate
eb37f1c6b92f38e308a9165def1bf874e1c119297eeb5544aa8f36f94a08a054
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.