Email hello@owntherun.app. Include whether the note is about a run that would not save, sign-in, sharing, or something else, plus iPhone model and iOS version if you can. We read mail as a small team.
Settings → Privacy & Security → Location Services → Own The Run → While Using the App, and Precise Location on. That is enough for a locked-screen run. Always is not required. If the map is blank, the GPS file can still save.
Sign out is on Profile. Delete account is on Customize profile. That removes the cloud account, shared runs, and posts. Runs that were never shared stay on the iPhone until you delete them or the app.
The Privacy Policy and Terms of Use are here and in the app under Profile.