Tonzo is a scorer for darts. Using it means you accept these terms.
Tonzo keeps the score of darts matches from the totals you enter, suggests checkout routes and keeps statistics. It records what is typed into it: a mistyped visit is scored as typed until it is undone.
Tonzo Pro is a one-time in-app purchase sold and handled by Apple. It is not a subscription and never renews. It belongs to your Apple Account, can be shared through Family Sharing, and can be restored from Settings in the app. Refunds are handled by Apple at reportaproblem.apple.com.
X01 at 301, 501 or 701 with double or straight out and any number of legs, cricket, up to four players, checkout routes, the caller, undo, and every match kept with its averages, without time limits and without advertising.
Matches, players and settings stay on your device, as the privacy policy describes. Deleting the app deletes them, and there is no copy to restore.