The app Flight Log ("the app") by itself does not collect any personal data. The app by itself will not transfer any of the data you may have entered into the app, to the author of the app or to third parties. The app works offline and no trackers are used. However the purpose of the app is to collect personal data of third parties (your clients). This is data you enter or import into the app. You can also export your clients data as a CSV-file. What you do with this data is a matter between you and your clients and local laws will aplly.