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Recomputer

A free web app, a smart calculator with instantly updating results.

https://recomputer.github.io/

Examples | Guide

For bug reports file an issue.

Alternatives

Other Use Cases

Same Use Case

Why yet another smart calculator?

Update Aug 2022: I've discovered several new (and some old) projects with great similarity to Recomputer. Here's an attempt at a comparitive overview. More alternatives are listed below.

RecomputerSoulverNumpadCruncherInsectFrink
PlatformmacOSwebwebwebweb, npmJava
InterfaceimmediateimmediateimmediateimmediateREPLprogramming lang / REPL
Pricefreepaidfreefreefreefree
Developmentopen sourceclosed sourceclosed sourceopen sourceopen sourceclosed source
Syntaxstrictmixed textmixed textmixed textstrictstrict
Variablesyesyesyesnoyesyes
Functionsyes?nonoyesyes
Fractionsyesnonononoyes
Unitsyesyesyesnoyesyes

There's lots of interesting differences and features between all of these. Frink is especially interesting being developed for 20 years now and having a vast list of built-in constants for all sorts of physical values.

Written in May 2021:

Acknowledgements

marijnh for CodeMirror.next

fawazahmed0 for currency API

Soulver and Numi for inspiration