205+ iOS apps curated and reviewed
If you already know Gear Ratio Calculator 2, this is the deeper bench. 205+ gear ratio calculator 2 apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of May 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 1.0★ (1) | No | Yes | May 2026 |
| 2 |  | Free | 3.3★ (3) | No | No | May 2026 |
| 3 |  | $3.99 | 4.3★ (8) | No | No | Jun 2026 |
| 4 |  | Free | 4.0★ (1) | No | No | May 2026 |
| 5 |  | Free | 4.4★ (23) | Yes | Yes | May 2026 |
| 6 |  | Free | 4.7★ (60K) | No | No | Jul 2026 |
| 7 |  | $0.99 | 4.8★ (4.2K) | No | Yes | Jul 2026 |
| 8 |  | Free | 4.7★ (12K) | Yes | Yes | Jul 2026 |
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 application simplifies driveline setup and predicts performance changes from gear ratios and tire size. It offers tools to calculate vehicle speed and RPM variables, aiding in rig planning and performance expectation.
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.
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 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.
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.
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.
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 utility app simplifies the calculation of final drive ratios for RC cars. It allows for offline calculations and provides insights into how different gear ratios affect acceleration, speed, motor load, and battery life.
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.
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 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 app calculates the correct fusion pressure for HDPE and Polypropylene pipe jobs. It simplifies the process by selecting your fusion machine and entering pipe details to determine the recommended theoretical gauge pressure.
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.
Easily estimate the quantity of various landscaping and hardscaping materials like gravel, stone, and sand. Get precise measurements in tons, cubic yards, or cubic meters for your projects.
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.
This app functions as a powerful graphing calculator with extensive scientific functions, unit conversion, and a built-in math and science reference. It supports graphing multiple equations, polar coordinates, and implicit functions, making it ideal for complex calculations and homework.
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.