World of Books App doesn't have Apple's iPhone Duo badge yet: version 8.5 (Nov 7, 2026) came out after the iOS 27 SDK, so it may or may not fill the screen. Checked automatically on Jan 1, 2000.
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
- None on the current version.
- 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
Version and badge history
First checked , version 8.5. Nothing has changed since.