Privacy Policy
TempoLens is a running app that records and analyzes your runs on your device. This policy explains what data the app handles and, specifically, what leaves your device when you use the optional AI coach.
Last updated: 8 June 2026
Your runs, routes, paces, personal records, shoe mileage, streaks, and all analysis are stored and computed on your device. TempoLens does not upload your run history, GPS routes, or account identity to our servers in the course of normal use.
With your permission, TempoLens reads your running workouts and related health metrics - such as heart rate, distance, cadence, and active energy - from Apple Health (HealthKit) so it can analyze your long-term progress and provide coaching. If you record a run in the app, TempoLens can also write that workout back to Apple Health so it stays in sync with your other apps.
Health data read from Apple Health is stored and analyzed on your device. It is never sold, and it never leaves your device unless you turn on the optional AI coach - in which case only the derived statistics described below, not your raw Apple Health records, are included in the request. You can review or revoke TempoLens's access at any time in the Health app under Sharing > Apps.
The AI coach is off by default. When you choose to use it, and only then, TempoLens sends a request to our server, which relays it to a third-party AI provider, such as OpenAI or Anthropic, and returns the coach's reply. The request contains:
The request does not include your name, account, email, GPS routes, or precise locations. We do not retain the contents of these requests after relaying them, and we do not use them to build a profile of you.
Our server enforces a strict schema for the fact sheet and rejects requests that include unexpected fields or obvious personal/location identifiers. This guard is designed to keep direct personal data out of coach requests.
For reliability, abuse prevention, and cost control, we keep limited endpoint metadata logs such as response status, timing, token usage counts, and short hashed identifiers. These logs do not include your coach message text or fact sheet content.
To keep the free coach available and prevent automated abuse, requests are verified with Apple's DeviceCheck and are rate-limited. DeviceCheck confirms the request comes from a genuine Apple device; it does not identify you.
When you use the coach, the fact sheet and your messages are processed by the AI provider that powers it, under that provider's terms and privacy practices. The coach offers general training information and is not medical advice; consult a qualified professional for any health concern.
TempoLens is not directed to children under 13, and we do not knowingly collect personal information from them.
We may update this policy as the app evolves. Material changes will be reflected on this page with a new "last updated" date.
Questions about privacy? Email iphonef1.net@gmail.com.