# JSCalculator > Advanced calculator that evaluates expressions instantly and supports formulas with variables. (iPhone/iPad app by Ivan Biaggio.) - Source: https://appshunter.io/ios/app/jscalculator/id443347724 (this page in markdown: same URL + `.md`) - Developer: [Ivan Biaggio](https://appshunter.io/developer/304972232) - Category: Productivity, Utilities - Price: $0.99 - Rating: 5.00/5 from 2 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 15 · 1 MB - Languages: English - Released: 2011-06-15 - Data updated: 2026-06-05 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/jscalculator/id443347724/reviews.md ## What is JSCalculator? Not an imitation of a limited stand alone electronic calculator of old. This is a calculator that exploits the power of the device it is running on. It works slightly differently, but it allows for more flexibility. As an example, JSCalculator evaluates what you type without the need of hitting "=" or an enter key. In this calculator, the "=" key is for assigning values to variables, not for telling it to execute a calculation! In JSCalculator, what you enter can be a standard calculation like "1+2", but it can also be much more! JSCalculator was developed by a physicist who needed to be able to enter a short formula on an iOS device, and have it evaluated for various values of some parameters. In addition to predefined functions and the ability to edit even longer or multi-step expressions, this calculator provides a set of the most used constants of nature (in SI units). Short list of the main features: - No enter key. No equal sign that must be pressed to execute a calculation. - What you write is evaluated as you type, and you immediately see the result. - Enter formulas, not just calculations. - Use multi-step formulas with intermediate (algebraic) variables. - Example of a multi-step formula: "p = sqr(a)+b;sin(p)/p" - Every formula you enter is stored, so that you can re-use it the next time you use the calculator. Cycle through all formulas with arrow buttons on the front screen or via standard lists. - Intelligent exponential/engineering notation for the calculated results (optional). - Several predefined mathematical functions. - Predefined constants of nature. - Ability to copy and paste. Ability to copy the result of calculations, or the values of one of the predefined constants of nature. - Numeric keys for typing numbers, predefined functions, or constants, but the standard keyboard will appear when the "T" button is pressed. Any issues or questions? Use our feedback form to tell us about them: http://ivpadev.com/support.html ## Key features - Instant evaluation as you type - Formula entry with variables - Multi-step formulas - History of entered formulas - Predefined constants of nature - Copy and paste functionality ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/jscalculator/id443347724/reviews.md ### 5/5 — Finds many uses *2011-07-04* I am using this app for a couple of weeks at this point. My favorite features: Type in all your functions, label them, and comment on the equations and variables. The app saves it all for future. Do multi-step formulas; use an outcome of one calculation as an input for another. Take advantage of predefined functions and constants to input really big expression (hardest part) and use them anytime in future (great!). Finally, tap the result to copy it anywhere. Convenient! Five stars. ### 5/5 — finally a powerful calculator *2011-06-27* I recommend this to everybody who needs to calculate values based on a formula. Great for Physics and engineering students. Another excuse to use your iphone. ## Frequently asked questions about JSCalculator ### What makes JSCalculator different from a standard calculator? JSCalculator evaluates expressions as you type, removing the need for an equals key. It also allows for the entry of complex formulas with variables, not just simple calculations. ### Can I use variables in JSCalculator? Yes, JSCalculator allows you to assign values to variables using the '=' key and incorporate them into your formulas for flexible calculations. ### Does JSCalculator store previous calculations? Yes, every formula you enter is stored and can be cycled through using the arrow buttons on the front screen or via standard lists, allowing for easy reuse. ### What kind of constants does JSCalculator include? JSCalculator provides a set of the most used constants of nature, presented in SI units, which can be easily accessed and used in your calculations. ### Is JSCalculator available on Android devices? Based on the provided data, JSCalculator is supported on iPhone, iPad, and iPod devices, indicating it is an iOS-exclusive application. ### How often is JSCalculator updated? The latest version of JSCalculator is 1.8.1, last updated on April 27, 2026. This suggests a history of updates, though the exact frequency is not detailed. ### What is the price of JSCalculator? JSCalculator is a paid application, priced at $0.99. This one-time purchase grants access to all its features. ### What is the age rating for JSCalculator? JSCalculator has an age rating of 4+, making it suitable for a wide range of users, including younger individuals who may be learning basic math concepts. ## Version history (last 5 releases) ### 1.8.1 — 2026-04-27 compatibility with latest os, bug fixes. ### 1.7.0 — 2023-02-18 Newest value of constants of nature everywhere, better compatibility with all devices. ### 1.6.1 — 2021-01-19 Updated to the latest version of the CODATA internationally recommended 2018 values of the Fundamental Physical Constants. Bug fixes. ### 1.6.0 — 2021-01-18 various improvements and bug fixes. ### 1.5.1 — 2017-11-06 compatibility with iOS 11 ## Apps similar to JSCalculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [Collabora Office](https://appshunter.io/ios/app/collabora-office/id1440482071) | 3.2 (89) | Free | Productivity | | [Math Notes - Solver & Editor](https://appshunter.io/ios/app/math-notes-solver-and-editor/id6474252913) | 3.7 (18) | Free | Productivity | | [Time Left • Final Countdown](https://appshunter.io/ios/app/time-left-final-countdown/id1534791123) | 4.6 (200) | Free | Productivity | | [Mathify: Math Editor](https://appshunter.io/ios/app/mathify-math-editor/id1549563845) | 4.4 (5) | Free | Productivity | | [Vectorworks Nomad](https://appshunter.io/ios/app/vectorworks-nomad/id506706850) | 2.9 (17) | Free | Productivity | | [X File Manager](https://appshunter.io/ios/app/x-file-manager/id1450712034) | 4.7 (87) | Free | Productivity | ## Related topics [ivpadev](https://appshunter.io/ios/topics/ivpadev) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-05.*