208+ iOS apps curated and reviewed
From beginner-friendly picks to power-user tools, our gear ratio calculator lite list covers 208+ iPhone apps updated through July 2026. Compare ratings, prices, and screenshots in one place.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 2.2★ (5) | No | Yes | May 2026 |
| 2 |  | Free | 1.0★ (1) | No | Yes | May 2026 |
| 3 |  | $3.99 | 4.3★ (8) | No | No | Jun 2026 |
| 4 |  | Free | 3.5★ (6) | No | Yes | May 2026 |
| 5 |  | Free | 4.4★ (23) | Yes | Yes | Jul 2026 |
| 6 |  | Free | 4.7★ (60K) | No | No | Jul 2026 |
| 7 |  | $3.99 | 4.7★ (6) | No | No | Jul 2026 |
| 8 |  | $0.99 | 4.8★ (4.2K) | No | Yes | Jul 2026 |
Calculate and visualize gear ratios for road bikes and MTBs. Simulate optimal gear combinations with various chainwheels, sprockets, and tires. Helps in selecting replacement parts by displaying speed-cadence graphs and gear ratio charts.
This application helps cyclists optimize their gear settings by calculating and visualizing gear ratios. It generates graphs for speed, cadence, and gear ratios based on various component combinations, aiding in the selection of replacement parts for improved performance.
This tool calculates gear ratios, torque, and speed for gear train systems. It allows users to simulate how these systems work on the fly, aiding in the design of custom gear systems before physical creation. Ideal for DIY enthusiasts and engineers.
Optimize your bicycle's gearing with this comprehensive calculator. Analyze gear ratios, calculate speed at cadence, and manage custom configurations. Features include component browsing, sharing options, and helpful articles.
This app offers a suite of specialized calculators for RC car enthusiasts. It helps with gear ratios, suspension geometry, corner weights, oil viscosity, fuel usage, and top speed estimations. It also stores data for multiple cars and includes helpful guides.
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.
Calculate gear teeth and speed for planetary gear systems. Quickly simulate how these systems work on the fly, ideal for DIYers designing their own systems before 3D printing. Understand the formulas and components of epicyclic gear systems.
This app offers a versatile calculator experience with both standard and scientific modes. Customize its appearance, use it in any orientation, and access additional tools like a notes tab and calculation history. It's designed for students and professionals needing accurate calculations.
This app is a powerful scientific calculator with graphing capabilities, a formula library, and a unit converter. It offers natural display input, advanced math functions for algebra, calculus, and statistics, and supports various number bases and formats.
Calculate a car's theoretical speed in any gear based on engine RPM, transmission, differential ratios, and tire size. It can also determine travel distance per engine revolution and estimate top speed for each gear. Supports both metric and imperial units.
This advanced calculator app offers a powerful math core and algebra engine for basic to complex calculations. It includes features like step-by-step solutions, handwriting recognition, and 2D graphing, making it suitable for students, engineers, and programmers.
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.
Calculate and compare bicycle gear ratios to find the optimal gearing for your ride. Input chainring and cog sizes, and see detailed metrics like gear inches, speed, and more. Customize your setup or choose from presets for easy comparison.
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.
Instantly analyze your bicycle's drivetrain performance. Calculate gear ratios, speed at any cadence, and climbing limits based on your bike's components and power output. Ideal for cyclists planning rides or optimizing their setup.
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.
Calculate essential dimensions for spur gears and pinions using diametral pitch or module. This tool provides outside diameter, center distance, and ratio for specific gear types.
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 is a powerful tool for RC car enthusiasts to calculate maximum speed and optimize gearing. It allows users to save setups, add notes, and email records for detailed tracking of performance. Supports a wide range of LiPo batteries and provides multiple calculation metrics.
A highly customizable calculator app offering a modern interface and extensive features. Personalize themes, button layouts, and visual elements. Track your calculations with a detailed history and access scientific functions.