Convert units and 148 currencies, now supporting the Duo
Does Unit Converter - Pro Units App work on iPhone Duo?
Yes. Unit Converter - Pro Units App's App Store page says it supports iPhone Duo, so the update is out. FoldHunt's editor hasn't seen it running yet.
- App Store confirmedThe developer, in the release notes for version 2.1.3 (released October 9, 2026): "Added support for iPhone Duo." The notes say nothing more. There are no pictures of it on the Duo yet. The App Store seller is Tue Nguyen Minh (id 1139120257).
Adapted for the fold
We're waiting on details of exactly what Unit Converter - Pro Units App changes for the fold. Are you the developer? Tell us.
About Unit Converter - Pro Units App
Unit Converter covers 16 categories of units and live rates for 148 currencies, with custom unit lists. Version 2.1.3 adds iPhone Duo support, without saying what changes. It comes from the developer of Ruler®. There are no pictures of it on the Duo yet.
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 2.1.3 (released October 9, 2026) mention iPhone Duo: "Added support for iPhone Duo."
App version: 2.1.3.
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
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.
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Sources: Unit Converter - Pro Units App on the App Store (apps.apple.com)
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Sky Guide
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A stargazing guide whose sky view widens as the phone unfolds
Launch partner: Named by Apple in its Newsroom article of October 22, 2026, on apps optimized for iPhone Duo. The App Store release notes for version 13.1 (released October 14, 2026) say Sky Guide is optimized for iPhone Duo and that the sky view widens as the phone unfolds.
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Simulator verified: IntraPixel, the developer, in a submission to FoldHunt on October 18, 2026, with pictures of the closed and open layouts on the app's website (intrapixel.com). The App Store seller is Hernan Rosario. The App Store description describes the closed, open and half-folded layouts.
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Nihongo
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A Japanese dictionary that keeps the page you're reading beside the definitions
Simulator verified: Serpenti Sei Japan, the developer, in a submission to FoldHunt on October 9, 2026, saying the iPhone Duo update will be on the App Store in time for the October 23 launch, with a screen recording of it in the iPhone Duo simulator (screen.studio). The developer says the layout was also tried on a real iPhone Duo at a workshop at Apple's Japan headquarters. The App Store seller is Serpenti Sei Japan LLC (id 881697245). The release notes for version 1.36 (released October 19, 2026) say Nihongo adapts as you fold and unfold iPhone Duo, making the most of both displays.
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