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Which apps work on the iPhone Duo

6,561 apps, checked against Apple's App Store data every day. Hand tests on a real Duo, pose by pose, come next.

Poses

1,685 apps · Letterboxed

  1. Med MnemonicsEvan SchoenbergMedicalLetterboxed
  2. My VA BenefitsScott FosterMedicalLetterboxed
  3. Nmap HandbookBasel AbuTalebDeveloper ToolsLetterboxed
  4. Putt Craft GolfChris HahnSportsLetterboxed
  5. Pyto IDEDevelobile S.p.A.Developer ToolsLetterboxed
  6. TREKNSTE, LLCMusicLetterboxed
  7. Taskmaster The AppAvalon TelevisionEntertainmentLetterboxed
  8. Thermo Watch for Nest & EcobeeMarko RadakovicLifestyleLetterboxed
  9. Viewfinder PreviewAdam FowlerPhoto & VideoLetterboxed
  10. Autoparts for Land RoverAndrey IvanchenkoShoppingLetterboxed
  11. Brush · Toothbrush TimerModum B.V.Health & FitnessLetterboxed
  12. CloudNewsPeter HedlundNewsLetterboxed
  13. Handwritten emailFapps World et Cie S.E.C.S.Social NetworkingLetterboxed
  14. HexerHans SchuleinDeveloper ToolsLetterboxed
  15. MapTapMobile GeographicsNavigationLetterboxed
  16. My Fussy EaterCiara MullanFood & DrinkLetterboxed
  17. Official DVSA Theory Test KitTSO (The Stationery Office)EducationLetterboxed
  18. OutCastArdan Studios, LLCWeatherLetterboxed
  19. RCIS Study GuideJared LapointeMedicalLetterboxed
  20. Sephardic SiddurShlomo Brothers LLCBookLetterboxed
  21. St. JosemariaJorge PanayottiReferenceLetterboxed
  22. The Photographer's EphemerisCrookneck Consulting LLCPhoto & VideoLetterboxed
  23. US Congress ExplorerJustin HamiltonReferenceLetterboxed
  24. WritePDF for iPhoneEuroSmartz LtdBusinessLetterboxed
  25. Camera Remote WatchAppMosaic.comPhoto & VideoLetterboxed
  26. CleverClever Inc.EducationLetterboxed
  27. Coloring WatchSydvesti OyEntertainmentLetterboxed
  28. Debt ManagerMH Riley LtdFinanceLetterboxed
  29. FaxCoverActual Software Inc.BusinessLetterboxed
  30. German TVKantaNewsLetterboxed

Automatic check, daily · updated

As of Nov 10, 2026, 27 of the top 100 free iPhone apps have Apple's iPhone Duo badge. The status of every app here comes from Apple's App Store data, read again every day. How an app behaves in laptop, book or tent mode takes a hand test on a real Duo; none has been tested yet. How we test