Checkbook Pro isn't optimized for iPhone Duo yet: version 3.3.5 (Aug 10, 2018) predates the iOS 27 SDK, so it runs letterboxed. Checked automatically on Nov 11, 2026.
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 poses: cover, open, laptop, book and tent. How we test
Version and badge history
| Date | Version | What changed |
|---|---|---|
| 3.3.5 | First check: no iPhone Duo screenshots | |
| 3.3.5 | Status: Letterboxed | |
| 3.3.5 | First seen (version 3.3.5) |