Scan a CE certificate and review it beside the details, with your license rings below
Does Ledger: Credential Tracker work on iPhone Duo?
Yes, since version 1.2.1 on October 19, 2026, says its developer: open, scan review goes side by side, your certificate on one half and the filled-in details on the other.
- App Store confirmedRyan Calpin of Calpin Labs, the developer, in a submission to FoldHunt on October 19, 2026, saying the app was tested in the iPhone Duo simulator. The release notes for version 1.2.1 (released October 19, 2026) say Ledger is made for iPhone Duo and iPad: open, scan review goes side by side, and folding mid-scan loses nothing.
Adapted for the fold
- Open · Inner display
Certificate beside the details
Open, scan review goes side by side: your certificate on the left, the details Apple Intelligence filled in on the right, and your credential's ring stepping forward underneath. Fold mid-scan and nothing is lost.
- Book · Partly folded
Split at the fold
Held like a book, the review splits exactly at the fold, and the camera and processing screens stay on the left page, clear of the hinge.
- Closed · Outer display
Rings on the cover
Closed, every license and certification shows as a progress ring, and scanning opens a single-column review.
About Ledger: Credential Tracker
Ledger keeps licensed professionals’ licenses, certifications and continuing-education credits current: nurses, physicians, therapists, teachers, CPAs, attorneys, EMS and more. Photograph a CE certificate, pick one from your library or import PDFs, and Apple Intelligence reads the title, provider, hours, date and category on your device. Rings show where each credential stands, one activity can count toward several licenses, and templates fill in the rules for dozens of licenses. It exports an audit-ready PDF transcript, with no accounts or servers.
Version 1.2.1, out on October 19, 2026, is made for the iPhone Duo and iPad. Open the Duo, and scan review puts your certificate on one side and the filled-in details on the other, Ryan Calpin says; held like a book, the split falls exactly at the fold.
Evidence reviews
What we checked, when, and what the evidence establishes. Each record preserves the support label at that check.
· App Store page reviewed
App Store confirmed · iphone-duo
The App Store release notes for version 1.2.1 (released October 18, 2026) mention iPhone Duo: "Made for iPhone Duo and iPad, plus a fix."
App version: 1.2.1.
Store text only: we haven't seen the app running, and the store page doesn't show how each pose is used.
View reviewed evidence ↗
Related guides
iPhone Duo poses: closed, open, book, standing and Split View
A plain-language guide to the ways you will hold iPhone Duo, what the phone itself does in each, and the apps and ideas that make the most of them. For anyone buying one, and for anyone building for it.
The best iPhone Duo apps so far (October 2026)
The apps worth installing now that iPhone Duo is on sale, from the apps Apple named as launch partners to indie apps whose developers have shown a real iPhone Duo layout, picked for what they do when you open the phone.
Do your apps work on iPhone Duo? What happens before they're updated
Every iPhone app opens on iPhone Duo, but only updated ones fill the inner display. What an app looks like before its developer adapts it, how to tell which are ready, and which popular apps have said so.
Is this your app?
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Sources: Ledger: Credential Tracker on the App Store (apps.apple.com) · Ledger on the Calpin Labs site (calpinlabs.com)
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