Open-source sports performance tools for data-driven athletes.
Single-file browser apps — no install, no server, no account. Drop in your data and go.
Drop a Coros / Garmin / SpeedCoach .fit file and get an instant per-piece breakdown — custom segments, first/last-30-stroke splits, and pace · rate · DPS · HR. Free, runs 100% in your browser, nothing uploaded.
| App | Description | Live |
|---|---|---|
| PaceMaxing | Rowing interval analyzer — FIT file → pace · rate · DPS · HR by custom segment, plus first/last-30-stroke splits | Open |
- Local-first. All processing happens in your browser. Your training data never leaves your machine.
- One file. Each tool is a single self-contained HTML file. Download it, open it, use it offline.
- Athlete-built. These tools came out of real training analysis on the Schuylkill River. They solve problems we actually had.
Pull requests welcome. See CONTRIBUTING.md.
Found a bug or have a feature idea? Open an issue.
MIT — use freely, attribution appreciated.