Support
Email robin@omit.nz and you'll hear back within a couple of days.
A price won't scan
Type the price in instead. Digits fill in from the right, so 3, 4, 9 is 3.49.
Restoring your purchase
On a new iPhone signed in to the same Apple Account, the unlock comes back by itself. If it doesn't, tap Restore purchase on the unlock screen.
Allergies and foods you avoid
Subtotal leaves out foods that typically contain what you avoid. Recipes vary by brand and country, so check labels too.