Quick answers
Where are my records?
They are stored locally on the Android device. Pinbench has no cloud account or automatic sync.
How do I restore Premium?
Use Restore purchases on the Premium or More screen while signed in to the Google Play account that made the purchase.
How do I cancel?
Open Google Play, choose Payments & subscriptions, then Subscriptions. Canceling stops the next renewal; it does not delete local records.