(SECUSO) Privacy friendly card game to find pairs of cards
About this app
Privacy Friendly Memo Game is a card game. The goal is to find the same cards in one turn. It belongs to the Privacy Friendly Apps group developed by the research group SECUSO at Karlsruhe Institute of Technology. More information can be found an secuso.org/pfa
The application provides two predefined card decks, as well as the option to select own images from your device. In addition to a single player mode, it is also possible to play in a dual player mode.
Privacy Friendly Memo Game has three difficulty level: 1. a game field with 4x4 cards (overall 16 cards) 2. a game field with 6x6 cards (overall 36 cards) 3. a game field with 8x8 cards (overall 64 cards)
What makes Privacy Friendly Memo Game different from other similar apps?
1. No permissions Privacy Friendly Memo Game does not require any permissions. The selection of images is done by a task to the gallery so the app does not have any access to the device's storage without the user's control and interaction.
For comparison: The Top Ten of similar apps from the Google Play Store requires an average of 3,9 permissions (in September 2016). These are for instance the access to the network.
2. No advertisement Many other free apps in the Google Play Store dazzle annoying advertising and also shortens battery life.
Feel free to contact us via: Bluesky - @secusoresearch.bsky.social https://bsky.app/profile/secusoresearch.bsky.social Mastodon - @SECUSO_Research@bawü.social https://xn--baw-joa.social/@SECUSO_Research/ Job opening - https://secuso.aifb.kit.edu/english/Job_Offers.php
Licensed under GPL-3.0-only, by SECUSO - Security Usability Society.
What's New in v1.1.3-google
Imported from the F-Droid repository index.
Version history
Jul 28, 2025 · 8.2 MB · Android API 17–34 · code 100
Imported from the F-Droid repository index.
SHA-256 82f83d9ea572240acabe45bcff9809f724d26f474896b150dcfd49d84037d8c6
Apr 25, 2025 · 8.2 MB · Android API 17–34 · code 9
Imported from the F-Droid repository index.
SHA-256 8c2b425a0e4b26d9cce0755edceeedccfda259bbe11f6c9d1a1fa69c095d9e12
Jan 6, 2025 · 6.5 MB · Android API 17–34 · code 8
Imported from the F-Droid repository index.
SHA-256 04fa2257526dcab66c9b3716403ffaaa523a75038ae0589d6cc913bfcd837397
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 org.secuso.privacyfriendlymemory 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, 1.1.2 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Memo Game (Privacy Friendly) 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 Memo Game (Privacy Friendly), and a listing is removed when the evidence for it stops holding up.
Get Memo Game (Privacy Friendly)
Every source we list for org.secuso.privacyfriendlymemory 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
82f83d9ea572240acabe45bcff9809f724d26f474896b150dcfd49d84037d8c6
Signing certificate
9dd96e14306c971f999f05e00599c8c9c17f83657972875bd22678dd937438bd
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
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