# Ratio & Proportion Calculator — Complete solution, all steps > Calculate proportions with detailed steps and history. (iPhone/iPad app by Glindemann, Sennoun, Langer GbR.) - Source: https://appshunter.io/ios/app/ratio-and-proportion-calculator/id1497341674 (this page in markdown: same URL + `.md`) - Developer: [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) - Category: Education, Utilities - Price: Free with in-app purchases - Rating: 4.70/5 from 16 App Store ratings · 9 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 179 MB - Languages: American English, French (France), German (Germany), Hindi, Indonesian, Japanese, Korean, Brazilian Portuguese, Russian, Chinese (Simplified, China) and 1 more - Released: 2020-02-01 - Data updated: 2026-08-26 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/ratio-and-proportion-calculator/id1497341674/reviews.md ## What is Ratio & Proportion Calculator? Finish homework instantly. Prepare for exams stress-free. Free, complete step-by-step solutions. Enter your values and calculate the missing value of a proportion. HOW IT WORKS Enter your values in the correct fields and get started. You receive the solution instantly and can share it with friends or classmates. YOUR PERSONAL DATA We don’t need it. Only anonymized data is collected, for example: - which features are used - how many solutions are generated This helps us improve. We cannot draw any conclusions about you. COST Everything is free to use. 24/7 access to your solutions. All solution steps always remain complete. If you need many solutions in a short time, various purchase options are available. EXTRAS - curated learning videos - feedback on incorrect inputs - manage your own solutions - app introduction CONTACT Questions and feedback via Discord or directly in the app review. ## Key features - Solve proportions with 3 variables - Detailed solution steps - Calculation history - Supports fractions and decimals - Option to remove ads ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Remove Ads | $1.99 | one-time | | +1 Convenience Token / 6h, max. +2 | $0.59 | one-time | | +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time | | +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time | | +150 User Tokens | $0.99 | one-time | | +30 User Tokens | $0.29 | one-time | | +300 User Tokens | $1.49 | one-time | | Lifetime Access | $1.99 | one-time | ## Recent user reviews (9 of 9) All indexed reviews: https://appshunter.io/ios/app/ratio-and-proportion-calculator/id1497341674/reviews.md ### 5/5 — I Adore the Explainer *2026-04-30* The app takes my foggy brain along the path of arithmetic and explains every step of it. Impressive! **Developer response:** Hello Siddiki, I really like your kind words. Thank you! I am glad this helps. Kind regards, Alex (the Dev) ### 1/5 — Steals money *2024-04-03* Charged money without consent **Developer response:** Hello CrazyAnt Studio, I (The Dev) apologize for the malfunctioning system. Finally I was able to fully rework this system so that no consent is required anymore. Third party advertisements systems has been removed compeltely. No money charge can pop up anymore. But to make sure that it is no misunderstanding - just charging money without accepting the purchase should not be possible. Let me know if there is anything else beside the privacy consent. Kind regards ### 5/5 — Great app!! *2022-09-17* The way this app helps you solve is great ! **Developer response:** Hello Tricia, nice to hear that we made good work! Thanks a lot and kind regards! ### 5/5 — O BBC I *2021-10-07* Kk I ok to red z zzz one r at B ewas rthe to ho milk vkoomo miÿ u I lk on er **Developer response:** Благодарим вас за положительный отзыв! ### 5/5 — Works perfectly *2020-10-23* This is amazing thank you **Developer response:** Thank you for your great feedback! ### 5/5 — anonymous 😀 *2020-08-28* love ❤️ **Developer response:** Thank you for your positive review! ### 5/5 — Good app *2020-04-02* Works as advertised **Developer response:** Thank you very much for your positive comment! ### 1/5 — Nul *2020-03-24* Nul **Developer response:** Salut! Nous aimons recevoir des commentaires. Si vous avez des suggestions sur la façon dont nous pouvons améliorer l'application, veuillez écrire à dev@gslstudios.com. Sincères amitiés (Google Traduction) ### 1/5 — Doesn’t work *2020-03-20* Doesn’t work. Calculator covers the whole display **Developer response:** Thank you very much for your feedback. We did check the problem. The only way something seems to be covered is by rotating the device to landscape orientation. Maybe your device is locked to that rotation. That might lead to this issue. If this does not fix it, your are very welcome to send a screenshot and your device model to dev@gslstudios.com. We will do further investigations. Kind regards GSL ## Frequently asked questions about Ratio & Proportion Calculator ### How does Rule of Proportion work? You enter three of the four variables in a proportion problem, and the app calculates the missing value. It provides detailed steps for each calculation and stores them in a history. ### What types of numbers can I enter in Rule of Proportion? Rule of Proportion supports entering fractions and decimals, as well as constants. This flexibility allows for a wide range of proportion problems to be solved. ### Can I see my past calculations in Rule of Proportion? Yes, all calculations are saved in a history function. You can view, delete, or manually sort entries in the history, and select an entry to load it automatically for recalculation. ### Does Rule of Proportion have ads? No, Rule of Proportion does not contain advertisements. There is an option to remove ads, indicating the app is ad-free by default. ### What devices is Rule of Proportion available on? Rule of Proportion is available on iPhone, iPad, and iPod. It is designed for iOS devices. ### How often is Rule of Proportion updated? The latest version is 3.0.0, last updated on February 18, 2026. This indicates a recent update, suggesting the app is actively maintained. ### What is the age rating for Rule of Proportion? Rule of Proportion has an age rating of 4+. This means it is suitable for children aged 4 and above. ### How do I share my solutions from Rule of Proportion? The app allows you to share the final solution of your proportion calculations. This feature is useful for students or professionals who need to present their work. ## Version history (last 5 releases) ### 3.2.3 — 2026-08-14 The latest release 'Least common multiple' is linked in the menu section now. Minor performance and UI fixes. ### 3.2.2 — 2026-08-04 - the status bar on top is integrated into the current app design - the app flow was improved (pop-up information was balanced) ### 3.2.1 — 2026-07-16 Maintenance update. Improving performance. ### 3.2.0 — 2026-06-19 Bringing all apps to the same security standard. Critical storage behaviour for solutions has been fixed. By the way - I run many apps with different math topics. If you like this one: Check them out as well! I always do my best to keep a high standard on my apps. If something does not meet the expectations, do not hesitate to contact me. ### 3.1.3 — 2026-06-06 There were some major fixes and adjustments for a more stable behaviour of the solution storage and loading. Therefore some database changes were made in the background. There are no performance losses and the functionality does not change. The background tasks are only done once within milliseconds. Following behaviour may occur (only temporary): - stored calculations have to be tapped twice to load fully - the order of the stored solutions may change If there are some losses of solutions do not hesitate to contact me and tell me the number of lost solutions + affected app. I will find a solution for this. Kind regards, Alex (the Dev) ## Apps similar to Ratio & Proportion Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [Triangle & Angle calculator](https://appshunter.io/ios/app/triangle-and-angle-calculator/id1278963382) | 4.0 (209) | Free | Education | | [Proportion_Calculator](https://appshunter.io/ios/app/proportion-calculator/id1601421898) | 2.0 (2) | Free | Education | | [Proportion Ratio Solver](https://appshunter.io/ios/app/proportion-ratio-solver/id6739363010) | — | Free | Education | | [Proportion Solver](https://appshunter.io/ios/app/proportion-solver/id1532616220) | 3.0 (2) | Free | Education | | [Trigonometry calc](https://appshunter.io/ios/app/trigonometry-calc/id1306864057) | 3.0 (2) | Free | Education | | [Maths Formulas Lite](https://appshunter.io/ios/app/maths-formulas-lite/id645431389) | 4.6 (100) | Free | Education | ## More apps by Glindemann, Sennoun, Langer GbR - [Pintrs EIGHT](https://appshunter.io/ios/app/pintrs-eight/id1043738177) - [Pintrs](https://appshunter.io/ios/app/pintrs/id1076171058) - [2048 Charming Easy](https://appshunter.io/ios/app/2048-charming-easy/id1154480597) - [Touch shapes in order](https://appshunter.io/ios/app/touch-shapes-in-order/id1185530946) - [Linear Equations Calculator](https://appshunter.io/ios/app/linear-equations-calculator/id1246761828) - [Chubby Mojis Animated Sticker](https://appshunter.io/ios/app/chubby-mojis-animated-sticker/id1258233753) All apps by Glindemann, Sennoun, Langer GbR: https://appshunter.io/developer/1024972809 ## Related topics [proportion](https://appshunter.io/ios/topics/proportion) · [inverse proportion](https://appshunter.io/ios/topics/inverse-proportion) · [direct proportion](https://appshunter.io/ios/topics/direct-proportion) · [proportion ratio solver](https://appshunter.io/ios/topics/proportion-ratio-solver) --- *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 2026-08-26.*