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Math Expression Evaluator vs OpenCalc: catalog facts
Math Expression Evaluator	OpenCalc
Free Free and released into the public domain.	Free Free and open source under the GPL-3.0 licence.
Android	Android
Supports named variables in calculations Text-based input similar to a programming language	Small download with no unnecessary permissions Scientific mode and calculation history
Basic compared with MathCad or Octave Android only	Android only No releases published on the GitHub repository
Downloadable app	Downloadable app
Closed source	Open source
License: Public domain	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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