Aera

Aera is an app for iPhone and Apple Watch from a solo developer in Székesfehérvár, Hungary. It analyses workout, heart rate and sleep data from Apple Health and calculates scores for recovery, stress, strain and sleep, measured against a personal 28-day baseline. From this, the app classifies days as hard, easy or rest days. For runs, Aera draws up to three loops from the current location by distance or duration, imports GPX files and gives turn-by-turn directions on iPhone and Apple Watch. The app requires iOS 26 and watchOS 11.6 and is available in German and eight other languages.

According to the privacy policy, Aera has neither an account nor its own server, and health data is processed on the iPhone and not uploaded. For anonymous usage statistics the app uses Mixpanel, keyed to a random identifier generated on install, and Sentry for crash and performance reports. Both are US providers, and the privacy policy contains no information on server locations or third-country transfers. Maps are loaded via Apple MapKit, and purchases run through Apple StoreKit. The project website is hosted on GitHub Pages, which is irrelevant for using the app.

The free version includes the daily scores with the hard, easy or rest classification, the route planner with turn-by-turn directions, workout analysis and personal bests, recap films, a 3D flyover of the runs of the last seven days, twelve months of history and export as JSON and GPX. Premium adds features such as a sleep reserve, saved places, flyovers of older routes, several saved drawn routes, history beyond twelve months, reports and all export formats. No account is required in either version.