Gear Ratio Calculator & RPM icon

Gear Ratio Calculator & RPMv1.1.1

Released September 14, 2026Major

iOS

What changed

  • New featureLive gear ratio calculator with instant output RPM and mechanical advantage computation
  • New featureSpeed/torque summary showing reduction vs. increase with exact multiplier
  • Content24-gear reference catalog covering various gear types
  • UXFilter and search functionality for the gear catalog
  • New featureSaved setups feature to create, name, and annotate gear configurations
  • Content6 built-in example setups for various mechanical applications
  • UXFully offline functionality with no account or ads required

Original release notes

Version 1.1.1

• Live gear ratio calculator — driving teeth, driven teeth, and input RPM compute ratio, output RPM, and mechanical advantage instantly
• Speed/torque summary showing reduction vs. increase with exact multiplier
• 24-gear reference catalog spanning spur, helical, bevel, planetary, and worm gear types
• Filter and search the gear catalog by type or keyword
• Saved setups — create, name, annotate, and delete your own gear configurations
• 6 built-in example setups covering bikes, industrial reducers, clocks, wind turbines, and worm drives
• Fully offline — no account, no ads, no internet required

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AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by Gear Ratio Calculator & RPM, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Data licensed under CC-BY-NC 4.0