Does LADDER Strength Training Plans work on iPhone Duo?
Probably, but it's not confirmed. LADDER Strength Training Plans was updated on 22 October 2026 (version 4.15.0), after Apple's iPhone Duo tools came out, but Ladder Technologies, Inc. doesn't mention iPhone Duo. Apps built with Apple's standard components fill the inner screen on their own once rebuilt.
- On iPhone Duo
- Updated, unconfirmed
- Developer
- Ladder Technologies, Inc.
- Category
- Health & Fitness
- Current version
- 4.15.0 · 22 October 2026
- App Store rating
- 5 out of 5 (213,680 ratings)
- Last checked
How we know
Updated since Apple's iPhone Duo tools came out (5 October 2026), but the developer doesn't mention the Duo. Apps built with Apple's standard components fill the inner screen on their own. See it on the App Store
History on iPhone Duo
- · Updated, unconfirmed (version 4.15.0)
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miSCSGobierno de Canarias · Health & FitnessUpdated, unconfirmedUpdated 19 October 2026 -
StravaStrava, Inc. · Health & FitnessUpdated, unconfirmedUpdated 26 October 2026 -
AutoSleepTantsissa · Health & FitnessNot yetLast update 15 September 2026 -
Hello NailsHello Nails · Health & FitnessUpdated, unconfirmedUpdated 14 October 2026 -
StreaksCrunchy Bagel · Health & FitnessUpdated, unconfirmedUpdated 18 October 2026 -
Airway GymApnea Bye, S.L. · Health & FitnessNot yetLast update 7 July 2026 -
HRV4TrainingA.S.M.A. B.V. · Health & FitnessNot yetLast update 23 September 2026 -
HealthFitStephane Lizeray · Health & FitnessAdaptedRelease notes, version 12.16.4
All apps on iPhone Duo in Spain →
Got an iPhone Duo? How does LADDER Strength Training Plans look on the inner screen?
No owner report yet for version 4.15.0.
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Good to know
Does LADDER Strength Training Plans work on iPhone Duo?
Probably, but it's not confirmed. LADDER Strength Training Plans was updated on 22 October 2026 (version 4.15.0), after Apple's iPhone Duo tools came out, but Ladder Technologies, Inc. doesn't mention iPhone Duo. Apps built with Apple's standard components fill the inner screen on their own once rebuilt.
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 LADDER Strength Training Plans be adapted to iPhone Duo?
Only Ladder Technologies, Inc. knows. We check LADDER Strength Training Plans 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.