- Omnifit
- Omnifit - Personal
- OMNIFIT BRAIN : The 쉼
- OMNIFIT BRAIN : The Focus
- OMNIFIT Mindcare
- OmniMedix Medical Calculator
- Omnipolis
- OmniSense™
- OmniTimer
- Omnivana
- OmNom Notes
- Omran Doc
- Omran Patient
- Omron Bi-LINK Gateway
- OMRON connect
- Omstars Yoga & Meditation
- OMTimes Magazine
- OMY! Sports
- On
- ON AIR FITNESS
- On Call Diabetes Management
- Oncall for Interns
- On Call Mini Diabetes Manager HD
- On Fitness
- On Moving Dance Company
- On Path - Spiritual Alerts
- On Purpose WellBeing Center
- ON STAGE Tanz- & Fitnessstudio
- ON THE BALL - Soccer Training
- On the Couch Magazine
- On the FLY Studios
- On the Go
- On The Go - Fit
- On The Go by fitDEGREE
- On-Site
- On/Go
- ONA: Hypnobirthing app
- OnBeat - group heart rate app
- ONBEAT - personal app
- OnCare
- Once(A special period tracker)
- Onco CHO
- ONCO Italia
- Oncobeta WeBe
- OncoPower
- Oncore Pilates Studio
- OncoSwiper
- ONDAM
- OnDiary Plus~行動目標、食事記録オンダイアリー
- ONDO Mobile
- ONDOC
- ONDOC Doctor
- OnDoctor
- OnDoctor Premium
- One A Hair and Beauty
- One Arena
- One Breath - Meditation, Sleep
- One Button Phone
- One City Fit
- One Click Referral
- One Clinic
- One Day - Your Routine Plan
- One Deep Breath
- One Down Dog
- One Drop Diabetes Management
- One Family Yoga and Fitness