Calculate your theoretical top speed for speedway racing. Input rev limit, gear ratio, final drive, and tire dimensions to get instant results. Save and compare different racing setups.



216+ iOS apps curated and reviewed
Finding the right trm gear ratio calculator apps can be overwhelming with so many options. We've analyzed 216+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | $1.99 | 5.0★ (5) | No | No | Jul 2026 | |
| 2 | Free | 4.9★ (404K) | Yes | No | Jul 2026 | |
| 3 | Free | 4.7★ (60K) | No | No | Jul 2026 | |
| 4 | Free | 4.9★ (33K) | Yes | Yes | Jul 2026 | |
| 5 | Free | 4.5★ (126K) | Yes | Yes | Jul 2026 | |
| 6 | Free | 4.9★ (243K) | Yes | No | Jul 2026 | |
| 7 | $1.99 | 4.8★ (1.1K) | No | Yes | Jul 2026 | |
| 8 | Free | 4.7★ (23K) | No | Yes | Jul 2026 |



Calculate your theoretical top speed for speedway racing. Input rev limit, gear ratio, final drive, and tire dimensions to get instant results. Save and compare different racing setups.


This utility app offers a clean and intuitive interface for performing calculations. It prioritizes a user-friendly design with large buttons and a clear display for quick and efficient use.




This app offers both basic and scientific calculation modes with over 30 scientific operations. It allows for customization of the app's appearance and includes features for note-taking, drawing, and viewing calculation history. It supports high accuracy calculations and nested parentheses.


This app offers a straightforward calculation experience, focusing on essential functions without unnecessary complexity. It includes basic arithmetic, percentage calculations, and advanced functions like square root. Users can customize the appearance with multiple color schemes and utilize features like result copying and split-screen multitasking on iPad.


This app offers both basic and advanced scientific calculations with an intuitive interface designed for tablets and phones. It includes features like currency conversion, calculation history, and the ability to share results. An optional premium membership removes ads and provides enhanced support.


Perform essential arithmetic operations with a straightforward calculator app. Its large buttons and clear display ensure ease of use, supporting both portrait and landscape orientations.


This app offers a calculator with an editable, line-by-line tape history, combining spreadsheet-like functionality with calculator simplicity. Easily correct mistakes, add comments, and share or print your calculations.


This free calculator app offers a fast, ad-free experience with a visual input and calculation history. Customize your experience with various keyboard sounds and colors, and access advanced scientific functions when needed.


This comprehensive calculator app offers a wide range of tools for everyday calculations, from basic arithmetic and scientific functions to unit and currency conversions. It includes specialized calculators for loans, health, fuel costs, GPA, and more, all within a clean and user-friendly interface.


This app offers a free basic and scientific calculator with an intuitive interface. It supports fractions, percentages, and advanced editing. Optional upgrades provide specialized calculators for fractions with units, polynomial and linear equation solving, graphing, and geometric shapes.


This app offers a clean and intuitive interface for both basic arithmetic and advanced scientific calculations. It includes a history tape to review past computations and supports various mathematical operations, making it suitable for everyday use and complex problem-solving.


This free scientific calculator offers essential features like RPN mode, unit conversions, and multiple undo/redo. It provides a taste of a more powerful version, with optional in-app purchases for expanded functionality.


This app helps radio control car racers calculate their final drive ratio and rollout. Easily select your car, input gear sizes, and get instant results. It also offers charts and saves favorite cars for quick access.


This app offers a smart calculator with a history tape and expression view to track your calculations. It includes over 500 unit conversions and scientific functions, with an Apple Watch extension for on-the-go use.


This app offers a powerful scientific calculator with a wide range of functions for trigonometry, statistics, and combinatorics. Users can define and evaluate their own functions, assign values to variables, and view multiple expressions simultaneously. It works offline and is completely free to use.


Calculate your exact age in various units like months, days, hours, minutes, and seconds. This app also includes a BMI calculator for additional health insights.


Plan your financial future with a powerful compound interest calculator. It helps you visualize investment growth with periodic contributions and plan retirement withdrawals with inflation adjustments. Offers detailed breakdowns and interactive charts for informed financial decisions.


A straightforward calculator app designed for simplicity, offering basic arithmetic operations and percentage calculations. It allows users to record and recall past results, customize colors, and enable touch sounds for a personalized experience.


A powerful and versatile calculator for all your Apple devices. Edit complex expressions, sync history across devices, and enjoy a clean, ad-free experience. Unlock advanced features like unit conversion and fraction support with an optional upgrade.


This app offers a simple and powerful way to convert between over 140 units across 12 categories. Easily switch between units, customize your experience with themes, and share your results.