DuoDiscover
Currency
A long-running currency converter covering more than 160 currencies
Currency is adapted for iPhone Duo (rebuilt with the iOS 27 SDK or later to fill the inner display) as of .
About this app
Currency is a currency converter by Jeffrey Grossman that has been on the App Store since 2008. It provides current exchange rates for more than 160 currencies and countries and is designed for quick conversions, which makes it useful when travelling abroad, shopping from overseas stores or checking prices in another currency. The app runs on iPhone, iPad and Apple Watch, so conversions can also be checked from the wrist. Currency is free to download with ads; an optional Currency+ annual subscription removes the ads and unlocks the app's additional features. Version 8.1, released on October 17, 2026, carries a single line in its release notes: optimized for iPhone Duo. The developer has not published further details about how the layout changes on the foldable, so the listing reflects only that statement. DuoDiscover lists Currency under Finance as a utility for converting amounts; it does not provide financial or investment advice, and exchange rates shown in any converter can differ from the rates a bank or card issuer actually applies.
Features
- Exchange rates for 160+ currencies
- Quick multi-currency conversion
- iPhone, iPad and Apple Watch apps
- Optional Currency+ subscription removes ads
How it uses iPhone Duo
Currency's version 8.1 release notes (October 17, 2026) consist of one line: "Optimized for iPhone Duo". No fold-specific features are described, so it is listed as Adapted. DuoDiscover has not yet tested it on a device.
Compatibility
| Tier | Adapted |
|---|---|
| Uses the fold | No |
| Category | Finance |
| Price | Free + IAP |
| Verified | · developer statement |
| Added |
What the tiers mean: Understanding iPhone Duo app compatibility ›
Developer
Currency is developed by Jeffrey Grossman.
Official website: www.currencyapp.com
Get the app
Discuss Currency in r/iPhoneduoapp ›
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Currency on iPhone Duo: FAQ
Is Currency optimized for iPhone Duo?
Partly. Currency is Adapted: it was rebuilt with the iOS 27 SDK or later to fill the inner display, but does nothing specific with the fold. Verified on October 17, 2026 (developer statement).
What does Currency look like on iPhone Duo unfolded and folded?
Currency's version 8.1 release notes (October 17, 2026) consist of one line: "Optimized for iPhone Duo". No fold-specific features are described, so it is listed as Adapted.
How much does Currency cost?
Currency costs Free + IAP on the App Store.
