A quick, minimal expense log, updated for the Duo
Does Niffler work on iPhone Duo?
Yes. Niffler'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 3.21 (released October 10, 2026): "Adapt iPhone Duo". The notes say nothing more. There are no pictures of it on the Duo yet. The App Store seller is 伟 邓 (id 1176787145).
Adapted for the fold
We're waiting on details of exactly what Niffler changes for the fold. Are you the developer? Tell us.
About Niffler
Niffler (今日账单 in China) is a minimal expense log with charts by month and year, several currencies and offline storage. Version 3.21 adds iPhone Duo support, the release notes say, without describing the layout. 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 3.21 (released October 10, 2026) mention iPhone Duo: "Adapt iPhone Duo - Adapt iOS 27"
App version: 3.21.
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)
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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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SubManager: Subscriptions
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Every subscription and its next renewal, open side by side on the Duo
Simulator verified: Ahnaf Mahmud, the developer, in a submission to FoldHunt on October 19, 2026, with a recording of the app in the iPhone Duo simulator posted on X and on the SubManager news page. The release notes for version 2.1.0 (released October 19, 2026) say SubManager is ready for iPhone Duo, with side-by-side layouts on every screen.
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Payday - Income & Expenses
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A globe beside your income and spending when open, the lists on the cover when closed
Simulator verified: France Pastrana, the developer, in a post on X with a video of Payday in the iPhone Duo simulator, saying it is being optimized for the Duo (@heyfrance_ on X). The App Store page does not mention the Duo yet.
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Checkbook - Bills to Budget
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Checkbook register that opens into a month calendar of payments beside your budgets
Simulator verified: Matt Corey, who makes Bills to Budget, in a Mastodon post with iPhone Duo simulator screenshots, saying there is work to do to support the Duo cleanly (iosdev.space). The App Store seller is CoreBits LLC.
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