Top 11 Open-Source Alternatives to Qalculate!

The top open-source alternatives to Qalculate! are Numi App, Insect, and EngineeringPaper.xyz. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Numi App Landing Page
1

Numi App

Numi is a beautiful text calculator for Mac.
Pricing:
- Open Source
#Calculator #Advanced Calculator #Text Calculator 29 social mentions
Insect Landing Page
2

Insect

High precision scientific calculator with full support for physical units.
Pricing:
- Open Source
#Calculator #Advanced Calculator #Engineering Calculator 9 social mentions
EngineeringPaper.xyz Landing Page
3

EngineeringPaper.xyz

Online app for engineering calculations. Solves systems of equations, checks and converts units automatically, supports plotting, and allows for the creation of a link to share your work. Free and open source, no registration required.
Pricing:
- Open Source
- Free
#Technical Computing #Engineering Calculator #Numerical Computation 3 social mentions
Numbr Landing Page
4

Numbr

An elegant calculator for the web
Pricing:
- Open Source
#Productivity #Calculator #Online Calculators 10 social mentions
Parsify Desktop Landing Page
5

Parsify Desktop

Extendable calculator for the 21st century ⚡
Pricing:
- Open Source
#Calculator #Advanced Calculator #Online Services 1 social mentions
Free42 Landing Page
6

Free42

Free42, an HP-42S calculator simulator
Pricing:
- Open Source
#Calculator #Knowledge Search #Advanced Calculator 6 social mentions
Math.js Landing Page
7

Math.js

Math.js is an extensive math library for JavaScript and Node.js.
Pricing:
- Open Source
#Calculator #Development Tools #Productivity 19 social mentions
Calculist Landing Page
8

Calculist

The open-source, web-based thinking tool that facilitates effective thinking for solving problems.
Pricing:
- Open Source
- Freemium
- $4.0 / Monthly
#Data Science Notebooks #Note Taking #Personal Notes 1 social mentions
NumPad Landing Page
9

NumPad

A web-based text editor with a powerful built-in calculator
Pricing:
- Open Source
#Calculator #Productivity #Unit Conversion 4 social mentions
kalker.xyz
10

kalker

Kalker is a calculator that supports user-defined variables, functions, ambiguous syntax, differentiation and integration. It runs on Windows, macOS, Linux, Android, and in web browsers (with WebAssembly).
Pricing:
- Open Source
#Calculator #Advanced Calculator #Knowledge Search
VisionVix Apps Landing Page
11

VisionVix Apps

Simplify Your Life with Free Daily Calculators, Easily Embed our tools on Your Site or Blog
Pricing:
- Open Source
- Free
- Free Trial
#Online Calculators #Advanced Calculator #Health Calculators