Does 台灣高鐵 T Express行動購票服務 work on iPhone Duo?
Not yet. 台灣高鐵 T Express行動購票服務's current version (7.31, 9 August 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
- Taiwan High Speed Rail Corporation
- Category
- Travel
- Current version
- 7.31 · 9 August 2026
- Popularity
- #94 in the top charts in Taiwan
- App Store rating
- 2.2 out of 5 (9,367 ratings)
- Last checked
How we know
Its current version is older than Apple's iPhone Duo tools (5 October 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 7.31)
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Pie VATPieSystems · TravelUpdated, unconfirmedUpdated 26 October 2026 -
軌島Hsiang Hsu · TravelUpdated, unconfirmedUpdated 27 October 2026 -
YouBike微笑單車 官方版YouBike Co., Ltd · TravelUpdated, unconfirmedUpdated 20 October 2026 -
易遊網ezTravel Co., Ltd. · TravelUpdated, unconfirmedUpdated 21 October 2026 -
台中通TCPASSTaichung City Government · TravelUpdated, unconfirmedUpdated 23 October 2026 -
KlookKlook Travel Technology Limited · TravelUpdated, unconfirmedUpdated 19 October 2026
All apps on iPhone Duo in Taiwan →
Got an iPhone Duo? How does 台灣高鐵 T Express行動購票服務 look on the inner screen?
No owner report yet for version 7.31.
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 台灣高鐵 T Express行動購票服務 work on iPhone Duo?
Not yet. 台灣高鐵 T Express行動購票服務's current version (7.31, 9 August 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 5 October 2026, use the whole display.
When will 台灣高鐵 T Express行動購票服務 be adapted to iPhone Duo?
Only Taiwan High Speed Rail Corporation knows. We check 台灣高鐵 T Express行動購票服務 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 (22 October 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.