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Which apps work on the iPhone Duo

7,251 apps, checked against Apple's App Store data every day. Hand tests on a real Duo, pose by pose, come next.

Poses

2,069 apps · Letterboxed

  1. ECG GuideWebMDMedicalLetterboxed
  2. HolyBible K.J.V. ProThoughtFulReferenceLetterboxed
  3. Breastfeeding Management 2Robert JenMedicalLetterboxed
  4. CardiographMacroPinch Ltd.Health & FitnessLetterboxed
  5. Drill and Tap ToolChewy ApplicationsReferenceLetterboxed
  6. PenaltyTimerFearless CodeSportsLetterboxed
  7. CCF Timer/CalculatorAlex SmithMedicalLetterboxed
  8. Dictionnaire Larousse françaisEditions LarousseReferenceLetterboxed
  9. Predator CallPurr AppsSportsLetterboxed
  10. All In One OphthalmologyAmir HakimiMedicalLetterboxed
  11. Dunstan BabyDunstan Baby LanguageHealth & FitnessLetterboxed
  12. Fast CleanMARVELS NETWORK TECHNOLOGY LIMITED.COUtilitiesLetterboxed
  13. Jetting for KTM 2T MotoBallistic Solutions LLCSportsLetterboxed
  14. NailHouseJADE MIEKO ROLANDLifestyleLetterboxed
  15. All Things Squishy!Cleaven SmithLifestyleLetterboxed
  16. CardiogramJOhn LyonsHealth & FitnessLetterboxed
  17. USCG Bootcamp Prep KitJeremy HernandezReferenceLetterboxed
  18. AlpacaAtmosphere Interactive LLCLifestyleLetterboxed
  19. MDILog RemoteOccupational Research & Assessment, Inc.MedicalLetterboxed
  20. OilField Formulas iHandy Calczhandos uakanovReferenceLetterboxed
  21. Anatomy QuizAlexander MokrushinMedicalLetterboxed
  22. Google Watch Web BrowserMalik Hamza KhalidEducationLetterboxed
  23. Shortwave Broadcast SchedulesBlack Cat SystemsLifestyleLetterboxed
  24. Dinger DistanceJackson DowSportsLetterboxed
  25. OrchidometerTotalContentMedicalLetterboxed
  26. Overcoming pain based on EMDRtrauma and pain management services pty ltdHealth & FitnessLetterboxed
  27. Photo WidgetSindre SorhusLifestyleLetterboxed
  28. ECHO ViewsiAnesthesia LLCMedicalLetterboxed
  29. Fountain Pen Ink JournalHemal ModiLifestyleLetterboxed
  30. Meditation Timer Pro倩 赵Health & FitnessLetterboxed

Automatic check, daily · updated

As of Nov 11, 2026, 25 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