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Store listing
By Huanjing Technology, from the App Store
Description by Huanjing TechnologyWritten by the developer, not by AppBrain. Click to read.
RatioRPM is a fast, focused gear calculator for road, gravel, and MTB cyclists.
Pick your wheel size, front chainrings, and rear cassette, then enter your cadence. RatioRPM instantly computes the gear ratio and development (rollout) for every chainring-and-cog combination, and converts cadence into real speed — so you can compare gears at a glance and find the right one before you ride.
Features: • Build your setup — choose wheel diameter, multiple chainrings, and a full cassette of cogs. • See every ratio — the full gear matrix with ratio and development for each combination. • Cadence to speed — slide your cadence (30–130 rpm) and watch speeds update live. • Smart highlights — quickly spot your highest/lowest gears and the closest matches. • Tactile feedback — feel each adjustment with a light haptic and a subtle chain-click sound.
Whether you're fine-tuning a climbing gear, building a new wheelset, or just curious how fast that 53×11 spins at 90 rpm, RatioRPM gives you the numbers in seconds.
Safety and technology
Found in the app by AppBrain
Price
Free
App size
2.11 MB
Content rating
Everyone
Technologies used by RatioRPM
Releases
Updates seen on the App Store
Version
1.0.1
Launched
November 2026
No changelog data
Rankings
App Store top charts
App Store Rankings for RatioRPM
This app is not ranked
About the app and developer
About RatioRPM
RatioRPM is a health & fitness app developed by Huanjing Technology.
What is the rating of RatioRPM?
RatioRPM has no ratings yet.
Is RatioRPM free?
RatioRPM is free. The app size is 2.11 MB. The latest version available is 1.0.1. The last update was on November 12, 2026.
What are the requirements for RatioRPM?
The app has a content rating of Everyone. The app has been available on the App Store since November 2026.
RatioRPM is made and published by
Huanjing Technology.
AppBrain is an independent app data site and isn't affiliated with Huanjing Technology.
The app name, icon, screenshots and description belong to Huanjing Technology and are shown as published on the App Store.
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
