Privacy Policy

Who we are

Smooth Air (Штиль in Russian) is made by an independent developer, Ilya Berdysh. Contact: [email protected]. This policy covers the iPhone app and the web version at smoothair.app.

What stays on your device

Your settings, flights, notes, letters to yourself, anxiety ratings and programme progress are saved only in the app’s storage on your phone. We can’t see them.

Your phone’s own backups (for example iCloud) may include this data — you control those. To erase everything, delete the app or clear the site data in your browser.

Sensors and location

Motion sensors (accelerometer and gyroscope) show how bumpy the flight is. Location (GPS) shows where you are on the route — only in Live flight and only if you allow it. Both are processed on the phone in real time and are never saved or sent anywhere.

When the app goes online

The app works offline. When online, it contacts only two places.

Airport weather. If you add a flight and are online, the app asks aviationweather.gov (US National Weather Service) for the current weather at the two airports. The request contains the airport codes and, like any internet request, your IP address. Their privacy policy applies.

The web version. When you open smoothair.app, the app loads from our server (Google Cloud, the Netherlands). We don’t keep visit logs; your IP address is processed only to deliver the page.

Nothing else: no analytics, no advertising or tracking SDKs, no cookies.

App Store and TestFlight

Apple handles downloads and the TestFlight beta. If you join the beta, Apple may share with us crash reports and any feedback you choose to send, under Apple’s terms. We use them only to fix the app.

Children

Smooth Air is not aimed at children under 13 (16 in the EU) and doesn’t collect data from anyone.

Your rights

We don’t hold your data, so there’s nothing for us to hand over, correct or delete — it all lives on your device. For any question, write to [email protected]. In the EU and UK you can also contact your local data protection authority.

Changes

If this policy changes, we’ll update the date above and mention meaningful changes in the app.