SPECTER

Why Specter

• Your route never leaves your phone. Every GPS coordinate is rotated by a per-user key on the device before upload. The server holds geographically meaningless data. Without your key, no one — including us — can recover where you actually ran.
• What others see is a cover route, not yours. The Cover Location Engine transposes your rotated track onto real roads in a different city. Distance and pace are preserved; the location is gone. Leaderboards, challenges, and the social feed all run on cover routes.
• You hold the key. A 12-word recovery phrase is generated on first sign-in. Save it once, restore on any device. Lose it and your routes are cryptographically unreadable forever — by anyone.

What's recorded

GPS routes, pace, heart rate (BLE strap or Apple Watch), elevation, cadence, power, and per-kilometer splits. HRV, RHR, and sleep pulled from Apple Health or Health Connect when you connect them. Apple Watch and Wear OS are first-class — Specter records standalone without your phone.

Built for people who care about both

Specter exists because the tradeoff between training data and location surveillance shouldn't have to exist. Athletes, journalists, security professionals, and anyone who'd rather not leak a 30-day pattern of where they live and where they go all deserve the same workout app the rest of the world uses — without the part where every step is logged on someone else's server.