Lisa's equation solver
v0.9.7o · 11.9 MB · code 44
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File information
UpdatedMar 1, 2025
PublishedMar 13, 2021
Packageat.harnisch.android.equations
Versionv0.9.7o (44)
Size11.9 MB
MD51f0b99f173d7c817e22f88d8de9303f2
Min SDK23
ABIsx86, x86-64, armeabi-v7a, arm64-v8a
Malware scanTRUSTED
Signature SHA1E6:BA:0B:15:59:EC:9E:33:79:7A:63:EF:AA:57:A0:39:3E:D5:7F:91
SignerCN=Werner Harnisch, O=Harnisch Ges.m.b.H., L=Wies, C=AT
Total downloads100,000
This version100,000
DeveloperHarnisch Ges.m.b.H.
Age ratingEveryone
What's new in v0.9.7o
★ Many updates to functionality and user interface
Security scan
TRUSTED
- Developer signature verified 2025-03-01
- Signature SHA1 E6:BA:0B:15:59:EC:9E:33:79:7A:63:EF:AA:57:A0:39:3E:D5:7F:91
- File MD5 1f0b99f173d7c817e22f88d8de9303f2
How to install Lisa's equation solver v0.9.7o on Android 6.0 Marshmallow+
Takes about 2 minutes. You'll need roughly 11.9 MB of free storage.
- Grab at.harnisch.android.equations_44.apk — hit the Download button above (11.9 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 1f0b99f173d7c817…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find at.harnisch.android.equations_44.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=Werner Harnisch, O=Harnisch Ges.m.b.H., L=Wies, C=AT. 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 Lisa's equation solver — tap Open on the install screen, or find the Lisa's equation solver icon in your app drawer (this build targets x86/x86-64/armeabi-v7a/arm64-v8a devices).
Common install errors for Lisa's equation solver
- "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.
- Works on one phone but not another — this build ships x86/x86-64/armeabi-v7a/arm64-v8a native code. Devices with a different CPU will reject it.