Open OSAWELL Air+, go to Profile > Account & data sharing and choose Delete my OSAWELL account. Your account and everything OSAWELL received from it are deleted at once, and so is everything on that phone.
Send an e-mail to [email protected] from the e-mail address linked to your Apple or Google sign-in, with the subject Delete my OSAWELL Air+ account. Before deleting anything we write to the address on the account to confirm; we act only on the reply from it. We delete the account within 30 days of your request and reply when it is done.
If you used Apple's "Hide My Email", your account is linked to a private relay address, not to your own. Delete the account in the app, or tell us the relay address shown in your Apple ID settings (Sign in with Apple > OSAWELL Air+) or the ID shown in the app under Profile > Account & data sharing; we confirm through that relay address.
In the app, Profile > Account & data sharing > Withdraw consent and delete my data at OSAWELL: we delete the records received from your account and receive no new ones; the account remains until you delete it.