ChainTracker

Update 06.08.2026 - Version 0.0.9: Now supports up to 5 chains and the Garmin Edge 550. Added per-chain starting mileage for chains that were already in use. Writes chain information in activity fit files. -- Chain Wax & Wear Tracker -- Keep track of your bicycle chain maintenance and wear directly on your Garmin Edge. This app tells you exactly when it is time to re-wax, lubricate or replace your chain — protecting your drivetrain and keeping your bike running smoothly. -- Two Counters for Every Chain -- Wax Cycle: Tracks the distance ridden since the last waxing or lubrication. When your configured maintenance interval is reached, the data field alerts you with a clear colour-coded warning. Lifetime Mileage: Tracks the total distance ridden on the chain across its entire lifespan. This helps you replace chains at the right time, reducing wear on expensive cassettes and chainrings. -- Manage Up to 5 Chains -- Perfect if you ride multiple bikes or rotate chains regularly. Track up to five individual chains, give each one a custom name, and switch between them from your smartphone. Mileage and maintenance history are kept separately for every chain. Ideal for setups such as: Summer / winter bikes Road / gravel bikes Training / racing chains Already using a chain? Enter its existing mileage as a starting offset, and the lifetime counter continues from there instead of starting at zero. -- Instant Status at a Glance -- A high-contrast colour scheme makes it easy to assess your chain's condition while riding: Green = Everything is fine Yellow = Maintenance due soon Red with a blinking "RE-WAX" warning = Service interval exceeded The blinking alert makes an overdue chain impossible to miss — no complicated numbers or menus, just the information you need, exactly when you need it. -- Everything Controlled from Your Smartphone -- All configuration and maintenance actions are handled through the Garmin Connect app — no fiddling with buttons while riding: Reset Wax Cycle: After waxing or lubricating, reset the wax-cycle counter to zero. Handy for maintenance done earlier than planned, for example after a wet ride. Switch Chains: Select the active chain for your current bike. Switching never resets anything — each chain simply picks up where it left off. Install a New Chain: Resets a chain slot completely, both lifetime mileage and wax-cycle distance, ready for a fresh chain. Change the active chain and trigger a reset in the same save, and the reset is always applied to the newly selected chain. -- Fully Customizable -- Custom wax / lubrication interval in km Adjustable warning threshold (default: 90%) Custom chain names Starting mileage per chain -- Persistent Across All Rides -- All values are stored permanently and carried across activities, device restarts and power cycles. Your chain mileage keeps accumulating automatically, ride after ride. -- Compatible with -- Garmin Edge 530 Garmin Edge 540 Garmin Edge 550 Notes: Distance is taken from your ride activity data (GPS and/or speed sensor). While the bike is stationary, or during indoor sessions without a speed sensor, no mileage is accumulated. Add the data field to a single data screen only — placing it on two screens at once will count your distance twice. Feedback, suggestions and feature requests are always welcome. Ride safe, ride smooth, and enjoy a clean, well-maintained chain!