For help, write to team@tryadagio.com.
No. It does not measure blood pressure, diagnose, or treat. Type numbers from a cuff. Labels such as in range or high are descriptive, not a diagnosis.
On this iPhone. There is no Adagio account. iCloud Backup does not keep the live log. Settings → Delete all data (or delete the app) removes it from the phone.
Journal → Doctor PDF → Share or Print. You can also Export log in Settings (a JSON file). Those files are yours. If you save them to iCloud Drive, that copy is in iCloud.
No. A very high reading shows an interrupt and tells you to use the Phone app or Emergency SOS. Adagio does not place a call.