An interval timer that stands half-folded, the countdown up and Pause and Skip in reach
Does Shift: Workout Interval Timer work on iPhone Duo?
Yes, since version 2.8 on October 22, 2026, says its developer: half-folded, it stands on its own, with the timer in the upright half and Pause and Skip on the flat one.
- App Store confirmedSteed, the name Jorick van Meijeren publishes apps under, in a submission to FoldHunt on October 23, 2026. The App Store seller is Jorick van Meijeren. The release notes for version 2.8 (released October 22, 2026) say: "Ready for iPhone Duo. The screen got bigger; the countdown didn't."
Adapted for the fold
- Closed · Outer display
The whole timer on the cover
Closed, the full interval timer fits the cover, sized for one hand. Turn it sideways mid-workout and the round and elapsed time move clear of the corner camera; the Live Activity fits the upright Dynamic Island.
- Open · Inner display
Like the iPad version, open
Open, Shift turns with the phone, and in landscape Settings and History open as panels beside the setup screen. During a workout the ring, countdown and controls keep the size they have on the cover, so your hands find them in the same place.
- Book · Partly folded
Countdown up, controls on the flat half
Half-fold it into an L and it stands on its own on the floor or a bench: the timer centers in the upright half, and Pause and Skip sit just past the fold on the flat half, in reach between sets.
- Standing · Hands-free
Stood as a tent
Folded into a tent, the phone also stands on its own on the floor or a bench while you train.
About Shift: Workout Interval Timer
Shift is a free interval timer kept as simple as possible: you set how long you work, how long you rest and how many rounds, then tap Start. Finished workouts stay in History, so your last workout can be your next preset. It has voice cues or tones that don’t lower your music, keeps time in the background, shows a Live Activity on the Lock Screen and in the Dynamic Island, and has a workout display you can turn sideways. There are no ads, accounts, subscriptions or tracking. Steed also makes AtlasDays.
Version 2.8, out on October 22, 2026, gets Shift ready for the iPhone Duo; its release notes say the screen got bigger but the countdown didn’t. Closed, the whole timer fits the cover. Open, Shift works like its iPad version, with Settings and History beside the setup screen in landscape, while the workout screen keeps its cover size. Half-folded, the phone stands on its own on the floor or a bench, as an L or as a tent; in the L, the countdown sits in the upright half and Pause and Skip on the flat half.
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 2.8 (released October 22, 2026) mention iPhone Duo: "Ready for iPhone Duo."
App version: 2.8.
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 on day one, from Apple's four 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?
Add the badge to your site or press kit. It links back to this page, where fans can upvote you.
<a href="https://foldhunt.com/apps/shift/"><img src="https://foldhunt.com/badges/featured-on-foldhunt.svg" alt="Featured on FoldHunt" width="220" height="54"></a>Need to update the listing? Email the editor.
Sources: Shift: Workout Interval Timer on the App Store (apps.apple.com) · Shift website (bysteed.com)