So cute and fun
Works great on the iPhone Duo. My son cracks up constantly
Free
In-App Purchases
About
Interact with a digital monster that lives on your phone's screen. Open and close your device to make its mouth chomp, and customize its appearance with different monster styles. Enjoy a unique, ad-free entertainment experience.
✓Monster interaction via screen folding
✓Customizable monster appearances
✓Unique sound effects
✓Screen tap controls
✓Works on compatible iPhones
✓Ad-free experience
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What's New in ChompDuo
1.0.2
October 24, 2026
Snappier, smoother bites. Fold your iPhone Duo to a right angle and the monster chomps, and every bite now feels smoother.
1
Subscriptions & In-App Purchases
$0.99
All Monsters
Unlock Softie, Organic, Mimic, Classic and Pumpkin.
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User reviews
Developer apps
FAQ
What is ChompDuo?
ChompDuo is an entertainment app where a digital monster lives on your phone. You can interact with its eyes and mouth by tapping the screen or folding your device.
How does ChompDuo work?
The app uses your phone's screen and hinge (on Duo devices) to animate a monster's mouth. Tapping the screen or folding the device makes the monster chomp, with unique sounds and visual feedback.
What monsters are available in ChompDuo?
ChompDuo offers several monster types, including Cartoon, Softie, Organic, Mimic, Classic, and Pumpkin. Each monster has its own distinct eyes, teeth, sounds, and internal appearance.
Is ChompDuo free to play?
The Cartoon monster is free to use. Unlocking the other five monsters requires a one-time purchase.
Does ChompDuo have ads?
No, ChompDuo is ad-free. The developer has stated there are no advertisements within the application.
Can I play ChompDuo offline?
The provided description does not specify offline play capabilities. However, as it's an interactive entertainment app, it likely requires an internet connection for full functionality.
What devices support ChompDuo?
ChompDuo is designed for iPhones, specifically mentioning compatibility with iOS 27 and newer. It also highlights functionality on iPhone Duo models.
How often is ChompDuo updated?
The app was last updated on October 24, 2026, to version 1.0.2. This suggests a recent update, but future update frequency is not detailed.
