Calculus Tools v1.3.5
APK · 743.9 KB · version code 135 · Android 2.1+ · uploaded Jan 20, 2013
The source store flagged this file with a security warning (Warning). We recommend not installing it. See other versions.
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File information
- Version
- v1.3.5 (135)
- Uploaded
- Jan 20, 2013
- Size
- 743.9 KB
- Requires
- Android 2.1+ (API 7)
- CPU support
- Any (no native code)
- Screen
- Small screens and larger
- MD5
- b2c468357b1f8c1c11e63638a82b32b6
- Signing certificate (SHA-1)
- 7B:E9:4B:8F:93:3B:34:8D:49:3F:52:11:F1:DC:8E:28:E9:F9:79:4E
- Signed by
- CN=Andrew McSherry, OU=Andyland, O=Andyland, L=Dayton, ST=OH, C=US
- File name
- com-andymc-derivative-135-2336160-b2c468357b1f8c1c11e63638a82b32b6.apk
- Package
- com.andymc.derivative
- Downloads (all versions)
- 4.8K
- Age rating
- PEGI 3 · Everyone
Permissions (2)
This version requests 2 permissions, 1 of them sensitive.
- Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
- Control vibration android.permission.VIBRATE
Security & authenticity
Security rating: Warning
Signing certificate
- Signature matches the Google Play version Checked by the source store on Jan 30, 2013.
- Certificate issued to “Andyland” This is the certificate of the Google Play version.
Store checks
- Developer signature check failed Mar 7, 2025
- Validated against Google Play Jan 30, 2013
- Antivirus scan passed Nov 10, 2020
- Uploaded by “stav888” Silver tier · 36,718 followers · uploading since 2011
Scans come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures. AAPKs doesn't scan files itself.
How to install Calculus Tools on Android 2.1+
You'll need about 1.5 MB of free space.
- Download the APK — tap Download APK above (743.9 KB). Chrome shows “File might be harmful” for every APK file; choose Download anyway only if you trust this file.
- Open the file — tap the download notification, or open Files › Downloads and tap com-andymc-derivative-135-2336160-b2c468357b1f8c1c11e63638a82b32b6.apk.
- Allow the install (first time only) — Android 8 and later asks for permission the first time an app opens an APK: tap Settings in the prompt, turn on Allow from this source, then go back. Manual path: Settings › Apps › Special app access › Install unknown apps (on Samsung: Settings › Apps › ⋮ › Special access). On Android 7 and older: Settings › Security › Unknown sources.
- Check the file (optional) — the MD5 of the downloaded file should be b2c468357b1f8c1c11e63638a82b32b6. If it differs, the file is damaged or was changed: delete it and download again.
- Tap Install — Android asks “Do you want to install this app?”. The source store flagged this file with a security warning; we recommend not installing it. If Play Protect blocks it, tap Cancel. If an earlier version is installed, this one only installs as an update when it is signed with the same certificate (SHA-1 shown above).
- Open Calculus Tools — tap Open on the install screen, or find it in your app drawer.
Common install problems
- “App not installed” — a version signed with a different certificate, or a newer version, is already installed (Android doesn't allow downgrades). Uninstall it first; back up your data, because uninstalling deletes it.
- “There was a problem parsing the package” — the file is incomplete, or your Android is too old (this version needs Android 2.1+). Download it again, or pick an older version.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source; for this file we recommend not to.