Version 1.0

• Live gear ratio, gain ratio, gear inches, and speed calculator (km/h and mph)
• Cadence stepper from 40 to 200 rpm in 5-rpm increments
• Six wheel size options: 700c, 650b/27.5", 29", 26", 24", 20"
• 10 built-in cassette presets covering road, gravel, MTB, and touring drivetrains
• Custom cassette entry via comma-separated cog sequence
• Save and manage named bike setups with hardest/easiest gear summary
• 5 seeded setups: Road Racer, Gravel Adventure, Trail MTB, Sprint Track, Loaded Tourer
• Fully offline — no account or network required