Does Royal Mail work on iPhone Duo?
Not yet. Royal Mail's current version (18.5.3, October 1, 2026) came out before Apple's iPhone Duo tools, so on the inner screen it opens in an iPhone-size window with black bars. It works, just not full screen.
- On iPhone Duo
- Not yet
- Developer
- Royal Mail Group Ltd
- Category
- Lifestyle
- Current version
- 18.5.3 · October 1, 2026
- App Store rating
- 4.6 out of 5 (413,878 ratings)
- Last checked
How we know
Its current version is older than Apple's iPhone Duo tools (October 5, 2026): on the inner screen it opens in an iPhone-size window with black bars. See it on the App Store
History on iPhone Duo
- · Not yet (version 18.5.3)
Other Lifestyle apps on iPhone Duo
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PartifulPartiful · LifestyleUpdated, unconfirmedUpdated October 19, 2026 -
TinderTinder LLC · LifestyleUpdated, unconfirmedUpdated October 27, 2026 -
T-LifeT-Mobile · LifestyleUpdated, unconfirmedUpdated October 25, 2026 -
GoWishOnskeskyen ApS · LifestyleUpdated, unconfirmedUpdated October 28, 2026 -
HingeHinge, Inc. · LifestyleUpdated, unconfirmedUpdated October 26, 2026 -
PinterestPinterest, Inc. · LifestyleUpdated, unconfirmedUpdated October 21, 2026 -
Bumble Dating AppBumble Holding Limited · LifestyleUpdated, unconfirmedUpdated October 26, 2026 -
The Official Wyze AppWyze Labs · LifestyleUpdated, unconfirmedUpdated October 26, 2026
All apps on iPhone Duo in the US →
Got an iPhone Duo? How does Royal Mail look on the inner screen?
No owner report yet for version 18.5.3.
Still looking for the iPhone Duo itself? Restocks sell out within minutes: get an alert the moment one lands near you.
Good to know
Does Royal Mail work on iPhone Duo?
Not yet. Royal Mail's current version (18.5.3, October 1, 2026) came out before Apple's iPhone Duo tools, so on the inner screen it opens in an iPhone-size window with black bars. It works, just not full screen.
Why do some apps have black bars on iPhone Duo?
Because they were built before Apple's iPhone Duo tools. On the inner screen, an app built for an older iOS opens in an iPhone-size window on a black background; one built for iOS 27.0 uses more of it but leaves some space blank; only apps built with the iOS 27.1 SDK, which developers have had since October 5, 2026, use the whole display.
When will Royal Mail be adapted to iPhone Duo?
Only Royal Mail Group Ltd knows. We check Royal Mail on the App Store again within about 1 h: this page changes as soon as a new version says it supports iPhone Duo.
Do apps that aren't adapted still work on iPhone Duo?
Yes. Every iPhone app runs on iPhone Duo: one that isn't adapted just doesn't fill the inner screen until its developer updates it.
How we measure
Sources: Apple's list of apps adapted to iPhone Duo (October 22, 2026) and each app's App Store record (version, release date, release notes, description). Apple doesn't say which tools an app was built with, so an app stays “Updated, unconfirmed” until its developer says more.