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SpeedCrunchUno Calculator
Free

Free and open source under the GPL.

 Free

Free to use; the underlying calculator code is under the Apache-2.0 licence.

Windows, macOS, Linux macOS, Linux, Android, iOS, Web
  • Results update as you type
  • Up to 50 digits of precision
  • Familiar Windows Calculator layout on other systems
  • Scientific and Programmer modes
  • Latest advertised release is the long-standing 0.12
  • Keyboard-centred design may not suit button-only users
  • Initial load can be slow
  • Built mainly as a framework showcase
Downloadable app Downloadable app, Web application
Open source Open source
License: GPL-2.0-or-later License: Apache-2.0
No account needed No account needed
Works offline Not stated if it works offline

Checked October 2, 2026

Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.