Gear Up

iOS app for calculating and comparing bicycle gear ratios.

What it does

Compare multiple drivetrain configurations side-by-side to find optimal gearing for your riding style. Calculate gear ratios, speeds at cadence, gear inches, and development meters for any chainring and cassette combination.

Features

• Side-by-side comparison of multiple gear setups
• Pre-loaded component database (Shimano, SRAM, Campagnolo groupsets)
• Per-setup tire size and cadence parameters
• Automatic bike type inference from components
• Comparison history with auto-save and restore
• Custom chainset and cassette creation

Tech Stack

• Swift / SwiftUI
• SwiftData for persistence
• iOS 17+