Health & fitness apps on iPhone Duo
Of the 27 popular health & fitness apps we track on the US App Store, 9 are confirmed to fill iPhone Duo’s inner display, including DraftKings, Headspace and PrizePicks. 18 still show black bars or unused space, including ESPN, MyFitnessPal and FanDuel Sportsbook & Casino.
Workout and tracking apps are mostly used closed. StandBy — which works on iPhone Duo even when it isn't charging — is the more interesting surface here.
US App Store · Ordered by US rating counts
- confirmed ready
- 9
- with black bars or gaps
- 18
- not confirmed yet
- 0
- Built for Duo7
- Full screen2
- Partly adapted4
- Black bars14
- Not confirmed yet0
Fill the screen now
DraftKingsDraftKingsChecked Nov 3Full screen
HeadspaceHeadspace Inc.Checked Oct 23Built for Duo
PrizePicksSidePrize, LLCChecked Oct 29Full screen
StravaStrava, Inc.Checked Oct 27Built for Duo
LADDER Strength Training PlansLadder Technologies, Inc.Checked Oct 23Built for Duo
NBANBA MEDIA VENTURES, LLCChecked Oct 23Built for Duo
PGA TourPGATOUR.com LLCChecked Oct 24Built for Duo
SmartGymSmartGym Services LLCChecked Nov 4Built for Duo
All health & fitness apps
ESPNDisneyChecked Oct 31Partly adapted
MyFitnessPalMyFitnessPal, Inc.Checked Oct 29Partly adapted
FanDuel Sportsbook & CasinoFanDuel, Inc.Checked Oct 28Black bars
Flo Cycle & Period TrackerFLO HEALTH UK LIMITEDChecked Oct 25Black bars
CalmCalm.comChecked Oct 28Partly adapted
CVS HealthCVS PharmacyChecked Oct 31Black bars- DraftKingsDraftKingsChecked Nov 3Full screen
AllTrailsAllTrails, Inc.Checked Oct 31Black bars- HeadspaceHeadspace Inc.Checked Oct 23Built for Duo
GameChangerGameChanger Media, Inc.Checked Nov 3Black bars
MyChartEpicChecked Oct 27Black bars
DAZNDAZN LimitedChecked Oct 29Black bars- PrizePicksSidePrize, LLCChecked Oct 29Full screen
NFLNFL Enterprises LLCChecked Oct 29Black bars- StravaStrava, Inc.Checked Oct 27Built for Duo
- LADDER Strength Training PlansLadder Technologies, Inc.Checked Oct 23Built for Duo
athenaPatientathenahealthChecked Nov 3Black bars- NBANBA MEDIA VENTURES, LLCChecked Oct 23Built for Duo
- PGA TourPGATOUR.com LLCChecked Oct 24Built for Duo
- SmartGymSmartGym Services LLCChecked Nov 4Built for Duo
Nara Baby & Pregnancy TrackerNaraChecked Oct 26Black bars
StompersStompers, LLCChecked Nov 4Black bars
ExposrNagia LLCChecked Nov 3Partly adapted
MCM EventsDilltree IncChecked Oct 26Black bars
New York Road RunnersNew York Road Runners, Inc.Checked Nov 2Black bars
ChiMarathonTata Consultancy ServicesChecked Oct 25Black bars
Next ShotCondor DigitalChecked Oct 31Built for Duo
Questions
Which health & fitness apps work on iPhone Duo?
All of them run on iPhone Duo. Of the 27 we track, 9 are confirmed to use the whole inner display: DraftKings, Headspace, PrizePicks, Strava, LADDER Strength Training Plans and NBA.
Do health & fitness apps have black bars on iPhone Duo?
18 of the 27 we track show black bars or unused space today, including ESPN, MyFitnessPal, FanDuel Sportsbook & Casino, Flo Cycle & Period Tracker and Calm. Apps built with the iOS 26 SDK or earlier run in a phone-sized window on the inner display until the developer ships an update built with the iOS 27.1 SDK. On the outer display they look normal.
Do health & fitness apps work on iPhone Duo’s outer display?
Yes. The 5.4-inch outer display works like a regular iPhone screen, so every app runs there at normal phone size.