The Unsure Calculator is an online tool that lets you calculate with numbers you’re not sure about.

Kalk Calculator is described as 'Kalk is a convergent calculator application built with the Kirigami framework. Although it is mainly targeted for mobile Linux platforms, it can also be used on the desktop' and is a Calculator in the education & reference category. There are more than 100 alternatives to Kalk Calculator for a variety of platforms, including Android, Windows, Web-based, Mac and iPhone apps. The best Kalk Calculator alternative is SpeedCrunch, which is both free and Open Source. Other great apps like Kalk Calculator are Fossify Calculator, Qalculate!, OpenCalc and yetCalc.
The Unsure Calculator is an online tool that lets you calculate with numbers you’re not sure about.

A calculator with syntax highlighting that supports user-defined variables and functions, math-like syntax, and some more advanced operations such as derivation and integration (estimate), and complex numbers.



Calculator with percentages, powers and functions. History with comments that is synced across all your devices. Cursor for editing anywhere. Simple interface with dark and light themes.




A Simple but elegant Calculator app made with Flutter using Google's Material Design with Currency (Exchange Rate) and Unit Converter.



Numbr is a currency calculator, a notepad that understands your calculation. You can use notes with numbers alongside each other. And all your numbers are instantly calculated as you type.



A simple calculator and unit converter app with Material Design 3 inspired by Windows Calculator.



With MyScript Calculator, perform mathematical operations naturally using your handwriting.




CalcTape is a revolutionary new kind of pocket calculator. With CalcTape, also extensive calculations remain clearly structured. CalcTape makes the arithmetic process visible - you can generate intermediate results and subsequently correct or change all numbers and operations.




handyCalc is a powerful calculator with automatic suggestion and solving which makes it easier to learn and use.





A kickass, open-source calculator that lets you do calculations and unit conversions naturally, with features like:
