The Pain Forecast

Cyclists know their FTP but not whether this climb is survivable — until they're already cracked on it. The Pain Forecast answers that ahead of time: enter your weight, threshold power, and full drivetrain, and it turns any gradient into an honest power forecast, colour-coded on a weather-warning scale (sustainable → on the rivet → cracked).

Drop in a GPX/TCX route and it finds every climb, picks the gear that survives it, estimates your time, and pulls the real hourly forecast (wind, rain, temp) for the moment you'll actually reach it. A built-in Fuel & Hydration planner turns that same route + forecast into a 3-day carb-load and on-bike fueling plan.

Runs entirely client-side — no account, no server storage — and installs as an offline-capable PWA.