Support

I don’t have an iPhone Duo

ChompDuo works on any iPhone with iOS 27. Tap the eyes twice and the mouth opens; tap the mouth to bite, or drag to squeeze it shut.

The jaws don’t follow the hinge

The hinge closes the jaws on iPhone Duo with the mouth open on the inside display. Open the Duo fully, then fold it slowly.

I bought All Monsters on another device

Open the monster list and tap Restore, using the same Apple Account you bought it with. Family Sharing is on, so your family can restore it too.

Refunds

Apple handles payments and refunds: reportaproblem.apple.com.