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OpenCalc

From public sources

A simple and beautiful calculator for Android downloaded more than 300k times

ApplicationCategory: Mobile Apps · Notes & productivity · Tools & terminalsOpen sourcedata checked Oct 16, 2026
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Overview

  • android
  • android-app
  • android-application
  • android-calculator
  • apk
  • calculator
  • fdroid
  • fdroid-repos
  • kotlin

Installation

Commands are shown, never run by the marketplace. Check them against the official documentation.

Compatibility

Unknown means no evidence was found — not that the product is incompatible.
PlatformStatusArchitectureEvidenceConfidence
AndroidCompatible—official build in release v3.2.1: OpenCalc.v3.2.1.apk0.60
iOSUnknown———

Releases

checked Oct 30, 2026
v3.2.1LatestSep 21, 2025Official source ↗

Files in 3.2.1

The marketplace does not host these files: downloads go to the official source. Files have not been scanned by us.
FilePlatformSizeSHA-256Download from the official source
OpenCalc.v3.2.1.apkandroid · apk2.2 MB43b6befd1fec…Official source ↗

Release history

Quality profile

algorithm quality-v1.0 · assessed Oct 16, 2026
Quality Score69
Risk Score0
Confidence 1.00
Quality Score and Risk Score are different measures. A high score does not guarantee safety.

Score components

Maintenance · 2012
last activity 97 days ago
Documentation · 1515
README 5109 chars, description present
Ready to use · 156
install instructions: no; releases: yes
Metadata · 108
3/4 of description, homepage, license, topics
Releases · 106
10 release(s), latest 389 days ago
Category confidence · 105
classifier confidence 0.5
Adoption · 108
1541 stars (log-dampened, 10k = max)
License clarity · 55
SPDX GPL-3.0
Community · 55
issues enabled, 191 forks

License

GPL-3.0
Known licensefrom the repository host

This is the catalog policy status, not legal advice.

Sources

github.com/clementwzk/OpenCalcPrimary★ 1,541 starslast activity Jul 10, 2026Primary repository · Confidence 1.00

Reviews

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README

From clementwzk/OpenCalc · license GPL-3.0 · fetched Oct 30, 2026

OpenCalc

A simple and beautiful calculator for Android.

Downloaded more than 300 000 times.

📖 Features

  • Lightweight (APK ~2MB)
  • No unnecessary permissions
  • Dark, Light, Amoled and Material You theme
  • Scientific mode
  • History
  • Portrait and landscape orientation
  • Quick settings tile
  • Available on locked screen
  • More...

⚠️ Requirements

  • Android 5.0+

📷 Screenshots

☕ Support

Support OpenCalc development by donating money. Thank you very much for your help! ❤️

💬 Discord

Join the Discord server!

🔨 Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

🌎 Translations

You can help translate OpenCalc on Hosted Weblate.

📜 License

This project is licensed under GPLv3

❔ Most Asked Questions

Why OpenCalc has it's own algebra system and doesn't use already existing algebra system like mXparser?

OpenCalc doesn't use mXparser anymore since the v2.0.0 for two main reasons:

  1. reason is that it allows much more freedom and flexibility. mXparser has many known problems, either with accuracy or with features not present. Creating your own implementation allows you to control everything.
  2. reason is that it's lighter to use your own implementation (mXparser has around 3 times bigger size than OpenCalc).

🫶 Contributors

Open the repository ↗