Scientific Calculator v2.0.20
APK · 1.2 MB · version code 20 · Android 4.0+ · uploaded Apr 23, 2020
- Signature matches the Google Play version Details
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File information
- Version
- v2.0.20 (20)
- Uploaded
- Apr 23, 2020
- Size
- 1.2 MB
- Requires
- Android 4.0+ (API 14)
- CPU support
- Any (no native code)
- Screen
- Small screens and larger
- MD5
- 64910b7cf132a2142508a550ec3f5482
- Signing certificate (SHA-1)
- 04:1E:52:65:AB:F6:87:48:84:EA:3C:49:E1:DD:34:BE:66:BD:25:EF
- Signed by
- CN=perfectapp
- File name
- com-perfectappstudio-scientificcalc-20-51407432-64910b7cf132a2142508a550ec3f5482.apk
- Package
- com.perfectappstudio.scientificcalc
- Downloads (all versions)
- 100K+
- Age rating
- PEGI 3 · Everyone
Permissions (12)
This version requests 12 permissions, 3 of them sensitive.
- Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
- Read phone status and identity Sensitive android.permission.READ_PHONE_STATE
- Read shared storage Sensitive android.permission.READ_EXTERNAL_STORAGE
- Add home-screen shortcuts com.android.launcher.permission.INSTALL_SHORTCUT
- Control vibration android.permission.VIBRATE
- Full network access android.permission.INTERNET
- Prevent the device from sleeping android.permission.WAKE_LOCK
- Push messaging (app-defined) com.perfectappstudio.scientificcalc.permission.C2D_MESSAGE
- Receive push notifications com.google.android.c2dm.permission.RECEIVE
- Remove home-screen shortcuts com.android.launcher.permission.UNINSTALL_SHORTCUT
- View Wi-Fi connections android.permission.ACCESS_WIFI_STATE
- View network connections android.permission.ACCESS_NETWORK_STATE
Security & authenticity
Security rating: Trusted
Signing certificate
- Signature matches the Google Play version Checked by the source store on Jul 13, 2026.
- Certificate issued to “perfectapp” This is the certificate of the Google Play version.
Store checks
- Developer signature not checked yet Jul 13, 2026
- Validated against Google Play Jul 13, 2026
- Antivirus scan passed Jan 13, 2021
- Uploaded by “split-store” Gold tier · 24,358 followers · uploading since 2019
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 Scientific Calculator on Android 4.0+
You'll need about 2.5 MB of free space.
- Download the APK — tap Download APK above (1.2 MB). 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-perfectappstudio-scientificcalc-20-51407432-64910b7cf132a2142508a550ec3f5482.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 64910b7cf132a2142508a550ec3f5482. 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?”. If Google Play Protect shows a warning, read it before you continue: the source store rated this file Trusted, but only install apps from sources you trust. 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 Scientific Calculator — 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 4.0+). 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.