Calculators & Unit Conversion
Platform information checked 2026-10-26. Use the provider’s platform instructions. Homebrew must already be installed for this macOS command; compiling on other systems has extra native-library requirements. No verified official APK download was recorded in this review.
Official app downloads and supported devicesEvaluate scientific expressions and custom functions in a local terminal.
The MIT-licensed calculator has no required subscription or hosted-model allowance. Your device and optional build tools are separate. Numerical integration, differentiation and approximate roots can be inaccurate; Kalker does not replace WolframAlpha’s full symbolic engine or knowledge service.
Pricing checked .
Check official pricing
Use a terminal scientific calculator with custom functions, complex numbers, matrices and numerical calculus. Visit the project website to check the currently available deployment options.
Public provider installation or download instructions reviewed; AltStack did not execute this software.
Availability checked 26 Oct 2026. Check the provider’s release or installation information
The MIT-licensed calculator has no required subscription or hosted-model allowance. Your device and optional build tools are separate. Numerical integration, differentiation and approximate roots can be inaccurate; Kalker does not replace WolframAlpha’s full symbolic engine or knowledge service.
brew install kalkerDocumented provider installation command for the stated platform and prerequisites. AltStack reviewed the instructions and did not run this command.
Documentation checked 2026-10-26; command not executed by AltStack.
Kalker provider setup documentationTechnologies recorded in the catalog snapshot.
Check dimensions and convert units in repeatable text calculations.
Numbat is free software under MIT or Apache-2.0; no paid software edition is required for its CLI or public web calculator. You supply the device and storage. Currency-rate fetching can contact an external service. It is a scientific calculator, not a symbolic algebra system or WolframAlpha knowledge database.
Calculate with units, variables and mathematical expressions in a free desktop calculator.
Free calculator · optional online rate updates
Handle calculations and common unit conversions in one Android app.
The provider describes Unitto as free, with no ads, in-app purchases or analytics. Ordinary calculations and unit conversion run locally; currency conversion needs Internet access. The GPL-3.0 source and usable F-Droid edition are available. The browser version is alpha, has limited language/theming support and loses user data on reload. This is a calculator/converter alternative for part of a WolframAlpha workflow; it does not include WolframAlpha’s knowledge database, cloud symbolic engine or every guided Pro solution. The alpha web build includes additional GPL-2.0 and MIT components with separate provider notices; the Android edition is the free app reviewed here.
