# GridCalc — Grid-based RPN calculator > Grid-based RPN calculator with visible, structured, and reviewable calculations. (iPhone/iPad app by ALAN WILLIAM DIPERT.) - Source: https://appshunter.io/ios/app/gridcalc/id6759011187 (this page in markdown: same URL + `.md`) - Developer: [ALAN WILLIAM DIPERT](https://appshunter.io/developer/1875969414) - Category: Utilities - Price: $14.99 - Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 16.0 · 5 MB - Languages: American English - Released: 2026-02-11 - Data updated: 2026-09-12 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/gridcalc/id6759011187/reviews.md ## What is GridCalc? GridCalc is a new kind of calculator for iOS. It combines Reverse Polish Notation with a visible grid so every step of your work is structured and reviewable. Instead of a hidden stack or opaque formula bar, each value and operation lives directly in the grid. Enter numbers incrementally. Apply operations. Reference prior cells. Change any upstream input at any time and see immediate recalculation. GridCalc is built for people who think in steps and care about clarity: • Engineers and developers working through exact calculations • Finance and trading professionals modeling scenarios on the go • Students learning RPN and structured problem solving • Anyone who wants spreadsheet-level visibility without spreadsheet friction Designed for fast, ad-hoc modeling on mobile, GridCalc keeps your work visible, precise, and easy to continue later. ## Key features - Visible grid for calculations - Reverse Polish Notation (RPN) - Incremental number entry - Reference prior cells - Immediate recalculation on input change - Structured problem solving ## Chart rankings - #199 in Top Paid · Utilities (US App Store) ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/gridcalc/id6759011187/reviews.md ### 5/5 — Intuitive and fun *2026-03-02* GridCalc is a pleasure to use and immediately intuitive. Highly recommended! ## Frequently asked questions about GridCalc ### What is GridCalc's pricing? GridCalc is a paid application, available for a one-time purchase of $14.99. This grants you full access to all its features without any recurring fees or in-app purchases. ### Does GridCalc have ads? No, GridCalc is completely ad-free. You can perform your calculations without any interruptions from advertisements. ### What devices does GridCalc support? GridCalc is designed for Apple devices, supporting both iPhone and iPad. It offers a seamless experience across these platforms. ### How often is GridCalc updated? The latest version, 3.1, was released on February 24, 2026, indicating recent development activity. Users can expect ongoing support and potential future updates. ### What is the age rating for GridCalc? GridCalc has an age rating of 4+, making it suitable for a wide range of users, including younger students learning about structured calculations. ### What makes GridCalc different from a standard calculator? GridCalc uniquely combines Reverse Polish Notation with a visible grid interface. This allows every calculation step to be structured and easily reviewed, unlike traditional calculators with hidden stacks or opaque formula bars. ### Can I edit previous inputs in GridCalc? Yes, a key feature of GridCalc is the ability to change any upstream input at any time. The grid will immediately recalculate to reflect the updated values, ensuring accuracy. ### Is GridCalc good for learning RPN? Absolutely. GridCalc is explicitly designed for students learning RPN and structured problem-solving. The visible grid makes the RPN process transparent and easier to understand. ## Version history (last 4 releases) ### 3.1 — 2026-02-24 • Now supports iOS 16 and later. • Added `STRUCT` mode for precise in-grid insert/delete editing with automatic shift/recompute behavior. • Added DEL LOCK mode so you can target deletions directly by selecting valid cells. • Added a GRID/NOTES workspace, with notes saved inside your `.gridcalc` files. • Improved reliability for New/Open/Save flows, autosave, and iCloud-linked file handling. ### 3.0 — 2026-02-18 GridCalc 3.0 introduces major refinements to clarity, responsiveness, and overall workflow polish. • Smoother retroactive editing • Improved grid readability and visual hierarchy • File support • General stability and usability enhancements throughout the app ### 2.0 — 2026-02-13 GridCalc 2.0 is our biggest usability upgrade yet, focused on speed, clarity, and confidence in every calculation. • New display controls: choose notation (Auto, Fixed, Scientific, Engineering), digit grouping, and precision • Improved infix preview behavior and readability • Faster reference editing: smoother REF/VAL/CANCEL flow with clearer interaction states • Better visual hierarchy in the grid: live vs consumed vs computed values are easier to scan • Streamlined calculation model: operation results now live directly in the operation cell • Expanded polish and stability improvements across editing, cursor behavior, and recomputation ### 1.3 — 2026-02-11 No release notes. --- *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 2026-09-12.*