This automotive calculator provides quick computations for over 45 formulas across various vehicle systems. It supports both U.S. and metric units, making it a versatile tool for mechanics, technicians, and enthusiasts.
AutoTech by Steven Clarner






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This automotive calculator provides quick computations for over 45 formulas across various vehicle systems. It supports both U.S. and metric units, making it a versatile tool for mechanics, technicians, and enthusiasts.




This app connects to a compatible ignition distributor via Bluetooth to create and edit ignition timing tables. It allows for real-time adjustments, saving and loading multiple tables, and includes a theft prevention feature. Real-time engine data is displayed on a gauges screen.






This tool helps racers and car enthusiasts predict performance metrics like elapsed time and speed, accounting for track conditions and engine modifications. It offers extensive conversion tools for fluids, temperatures, and weights, simplifying complex calculations for both the track and the garage.


Calculate your vehicle's top speed for each gear using transmission ratios, differential gear ratio, and rev limit. Optimize your car's gear ratio for track performance or drag racing, choosing between kmh and mph units.


Calculate the error in your speedometer when using tires of different dimensions than recommended by the manufacturer. It helps you find tire sizes that minimize speedometer inaccuracies for your vehicle.


Calculate and compare tire sizes for your vehicle. This tool helps you understand the impact of different tire dimensions on performance and ensures your speedometer remains accurate after upgrades. It's designed for automotive enthusiasts and anyone looking to optimize their vehicle's setup.


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.


Calculate tire and wheel fitment for your vehicle. This app helps you understand tire stretch, rolling radius, and speedometer error. It also allows for multiple wheel comparisons and saving results as images.


This utility app provides a collection of essential formulas and calculators for powersports and engine tuning. It allows users to perform complex calculations directly on their iPhone, eliminating the need for a laptop or desktop computer.


This app helps you compare and visualize different tire and wheel configurations for your vehicle. It calculates key dimensions, checks for fitment issues, and provides technical references. Supports both Imperial and Metric units.