# RJ Calculator Alternatives

RJ Calculator is described as 'scientific calculator with most basic functions like trigonometric functions, logarithms and base conversion. Also, statistic calculations like standard deviation and regression' and is an app in the Education & Reference category. There are more than 50 alternatives to RJ Calculator for a variety of platforms, including Windows, Android, Online / Web-based, Mac and Linux. The best alternative is SpeedCrunch, which is both free and Open Source. Other great apps like RJ Calculator are Wolfram Alpha (Freemium), Windows Calculator (Free, Open Source), fxSolver (Free) and OpalCalc (Freemium).

- SpeedCrunch is a free, fast, high precision open source algebraic calculator with an intuitive interface and a extensive list of features, including: Unlimited Variables, Syntax Highlighting, Functions, with 'Automagic' Completion, 50 Decimal...
- Free • Open Source
- Mac
- Windows
- Linux
- PortableApps.com

- Wolfram Alpha is a "Computational Knowledge Engine" - different from a search engine, it answers factual queries directly by computing the answer from structured data, rather than providing a list of documents or web pages that might contain the answer.
- Freemium • Proprietary
- Online
- Android
- iPhone
- Windows Phone
- iPad
- Kindle Fire

- A simple yet powerful calculator that includes standard, scientific, and programmer modes, as well as a unit converter. It's the perfect tool to add up a bill, convert measurements in a recipe or other project, or complete complex math, algebra, or geometry problems.
- Online math solver, equation library, graphing calculator and science/engineering problem helper.
- OpalCalc is a brand new type of calculator for the PC. As easy to use as Notepad or a word processor, OpalCalc allows natural language in the sum and multi-line support so you can go back and adjust your previous calculations on the fly.
- Freemium • Proprietary
- Windows

- High precision scientific calculator with full support for physical units. - Evaluation of mathematical expressions - Parsing and handling of physical units (All SI units, imperial units, time-based units, ..
- Calculator provides simple and advanced mathematical functions in a beautifully designed app.
- Calculator is an application that solves mathematical equations and is suitable as a default application in a GNOME Desktop environment.
- RealCalc Scientific Calculator Android's #1 Scientific Calculator. A fully featured scientific calculator which looks and operates like the real thing.
- Giac/Xcas is a free computer algebra system for Windows, Mac OS X and Linux/Unix (license GPL3, for commercial dual-license contact us).