Building
Building a Native GPS Engine with Capacitor
Notes from wiring a custom location engine into a hybrid mobile app — and the tradeoffs along the way.
Hybrid mobile apps give you the reach of the web with access to native APIs. But the moment you need continuous, accurate location tracking, the abstractions start to show their seams.
Why not the built-in geolocation
The Web Geolocation API is fine for a one-off “where am I?” lookup. It falls short for a running session that needs regular fixes, background updates, and battery awareness.
Bridging native location into the web layer
Capacitor’s plugin system lets you define your own native modules and call them from TypeScript. The interesting part is the protocol: how to stream frequent location updates without flooding the bridge.
Tradeoffs worth writing down
Batching updates, coalescing stale fixes, and deciding when to hand control back to the OS all matter more than the happy path. Here are the decisions that cost the most time to get right.
Thanks for reading.