中国象棋™ has Apple's Made for iPhone Duo badge: version 10.1 ships iPhone Duo screenshots for the inner screen. Checked automatically on Nov 10, 2026.
The developer's iPhone Duo screenshots
From the App Store listing. They show what the developer designed, not a test.
How the status was checked
- Automatic check
- Every day, from Apple's App Store data: the version, its date, and whether the listing has screenshots made for the Duo.
- Duo screenshots
- For the inner screen only. That doesn't mean it fails closed; the developer just didn't upload cover-screen ones.
- Hand test
- Not tested on a real iPhone Duo yet. A hand test covers five postures: cover, open, laptop, book and tent. How we test
Apple's badge comes from the Duo screenshots on the App Store listing. It says the developer designed for the Duo; it says nothing about laptop, book or tent mode.
Version and badge history
First checked , version 10.1. Nothing has changed since.