Einstein's riddle
v2.9.1 · 5 MB · code 29
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File information
UpdatedNov 15, 2025
PublishedOct 24, 2022
Packageru.nika.development.einsteinsriddle
Versionv2.9.1 (29)
Size5 MB
MD54d54cf6a5bc4d4ae6b1eb54dd020b818
Min SDK23
Malware scanTRUSTED
Signature SHA1C7:09:FD:74:88:80:56:0D:3D:D8:F9:11:76:13:46:9B:04:3C:A1:CE
SignerCN=Aleksandr Melnikov, L=Saint Petersburg, C=RU
Total downloads10,000
This version10,000
DeveloperAleksandr Melnikov
Age ratingEveryone
What's new in v2.9.1
Problem when top bar is overlapping with game screen was fixed.
Security scan
TRUSTED
- Developer signature verified 2025-11-15
- Signature SHA1 C7:09:FD:74:88:80:56:0D:3D:D8:F9:11:76:13:46:9B:04:3C:A1:CE
- File MD5 4d54cf6a5bc4d4ae6b1eb54dd020b818
How to install Einstein's riddle v2.9.1 on Android 6.0 Marshmallow+
Takes about 2 minutes. You'll need roughly 5 MB of free storage.
- Grab ru.nika.development.einsteinsriddle_29.apk — hit the Download button above (5 MB). If your browser warns about APK files, choose Keep or Download anyway — that warning fires on every APK, not just this one.
- Trust your browser to install — on Android 8+ go to Settings → Apps → Special access → Install unknown apps, pick the app you downloaded with (Chrome, Firefox, Files, etc.), and flip Allow from this source. On older Android, toggle Unknown sources under Security.
- (Optional) Verify the file — compute the MD5 of the downloaded APK and make sure it matches 4d54cf6a5bc4d4ae…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find ru.nika.development.einsteinsriddle_29.apk in your Files app under Downloads, then tap it. Android's package installer will appear.
- Check the signer — the install screen will name the publisher. For this build it should read CN=Aleksandr Melnikov, L=Saint Petersburg, C=RU. If it doesn't match, cancel — you have the wrong file.
- Review permissions & tap Install — scroll the permission list, then confirm. If Play Protect flags it, tap Install anyway (this APK was scanned as TRUSTED).
- Done — open Einstein's riddle — tap Open on the install screen, or find the Einstein's riddle icon in your app drawer.
Common install errors for Einstein's riddle
- "App not installed" — usually means an older or differently-signed version is already on your device. Uninstall it first, then retry. Your data may be lost unless you back it up.
- "Parse error" — the APK is for a newer Android than yours. This version needs Android 6.0 Marshmallow or later. Pick an older build from the versions list below.
- "There was a problem parsing the package" — the download was interrupted. Delete the file and re-download over Wi-Fi.