AppMarketSpy › Utilities › Gear Ratio & Speed Calculator
Gear Ratio & Speed Calculator
RPM, Transmission & Tire Calc
HyeongSeok Oh · Utilities
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App info
- Developer
- HyeongSeok Oh
- Category
- Utilities, Productivity
- Released
- Sep 14, 2026
- Version
- 1.1.3 (Oct 5, 2026)
- Price
- Free
- Size
- 6.4 MB
- Requires
- iOS 16.0
- Age rating
- 4+
- Languages
- English, German, Japanese, Korean, Portuguese, Spanish
In-app purchases
noneCurrent prices, App Store US.
About Gear Ratio & Speed Calculator
Gear Ratio & Speed Calculator is an all-in-one drivetrain calculator and setup simulator designed for track enthusiasts, racers, off-road builders, and gearheads. Calculate exact relationships between engine RPM, vehicle speed, gear ratios, final drive, and tire sizes. Plan modifications and preview their impact before turning a single wrench. WHAT IF? VEHICLE SETUP SIMULATOR • Compare your current vehicle setup with a new What If? configuration side by side. • Evaluate changes in tire dimensions, final drive ratios, and transmission swaps. • Compare cruising RPM at 60, 80, 100, 120, and 130 km/h (or mph). • Check top speed and speed at specific RPM intervals (3,000 to redline). • Detailed gear-by-gear ratio and speed delta comparison. • Visual gear graph comparing current vs new setup curves. • Dedicated impact breakdown cards for tire size, final drive, and transmission changes. •…
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