Work · alternatives · 2026

24 alternatives to kalker

A calculator that supports math syntax, complex numbers, etc

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. kalker launched in 2021; newer entries below may have overtaken it.

1. 1KA
   Kalk, A calculator with math syntax, complex numbers▲239

   2021 · kalk.strct.net · its alternatives →

2. 2CA
   CalcuLaTeX, a pretty-printing calculator language▲230

   2021 · mkhan45.github.io · its alternatives →

3. 3
   Numbr▲289

   An elegant calculator for the web

   2021 · its alternatives →

4. 4
   Caligator▲134

   An open-source calculator & convertor that thinks like you

   2019 · its alternatives →

5. 5
   Simpleator▲62

   A simple calculator for complicated math

   2019 · its alternatives →

6. 6PA
   Procal: A simple Qt-based programming calculator▲173

   2023 · github.com · its alternatives →

7. 7
   ConvertCalculator 2.0▲148

   Create powerful, beautiful Calculator forms

   2019 · its alternatives →

8. 8FA
   Figr.app – a multi-user, notepad style calculator (desktop app)▲275

   Hi all, just posting an update to my previous Show HN, where I announced a side-project I worked on which was a (web version) of a multi-user, notepad style calculator: https://news.ycombinator.com/item?id=31817997 After a couple of user requests (and having a good think about it) I decided to migrate the web UI to create a Mac and Windows desktop app. After using it a little bit, I feel this is a much better experience than the webapp, and reduces a lot of the friction if I wanted to run a few small calculations. You can find the download links below:…

   2022 · figr.app · its alternatives →

9. 9
   Calculator Notepad▲75

   A free-form calculator for Chrome

   2022 · its alternatives →

10. 10
    Calculo▲195

    Calculator from the future

    2024 · calculo.tech · its alternatives →

11. 11
    Kaktovik Calculator▲6

    A base-20 Integer Math calculator using Kaktovik numerals.

    2023 · its alternatives →

12. 12
    figr.app▲94

    Realtime, multi-user notepad calculator

    2022 · its alternatives →

13. 13AA
    An animated graphing calculator implemented in a pixel shader▲30

    2020 · fofpx.com · its alternatives →

14. 14
    inst Calculator▲53

    Functionality meets simplicity, calculate with ease

    2022 · its alternatives →

15. 15
    CalPal▲105

    The notebook calculator that thinks for you (now with AI).

    Jan 2026 · trycalpal.app · its alternatives →

16. 16
    Numbrrrs▲90

    The ios-style calculator that knows you

    2025 · numbrrrs.app · its alternatives →

17. 17
    CalcMate▲88

    calculate numbers, dates, units within notes

    2023 · its alternatives →

18. 18
    Scalar - Advanced Calc. & Math Scripts▲4

    Reinvented calculator, functions, graphs & math scripting

    2019 · its alternatives →

19. 19RT
    Rich Text Math Editing on the Web with Markdown and AsciiMath▲45

    2021 · writer.math.dev · its alternatives →

20. 20VA
    val – An arbitrary precision calculator language▲34

    Wrote this to learn more about the `chumsky` parser combinator library, rustyline, and the `ariadne` error reporting crate. Such a nice DX combo for writing new languages. Still a work in progress, but I thought I'd share :)

    2025 · github.com · its alternatives →

21. 21
    Programmer Calculator▲4

    A command line calculator made for programmers

    2021 · its alternatives →

22. 22
    MathSolverAI▲1

    Calculator for everyone

    2024 · apps.apple.com · its alternatives →

23. 23KL
    KatLang – Language for Calculations▲17

    2021 · katlang.org · its alternatives →

24. 24
    Online Calculation Network▲6

    We launched Mathematical Calculator

    2025 · mathematicalcalculator.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →