- X Factor
- X Shadyside
- X Spin Pro
- XCarePro
- X-CORE
- X-Dance
- X-Fit
- XFIT
- X-Fit Studio 線上約課
- X-Fit Studio 線上約課平台
- X-Fit Галактика
- X-Fit Калининград
- XFIT Иваново/Кинешма/Кострома
- X-Fit Н. Новгород
- X-Fit Норильск
- X-Fit2
- X-Fitness
- X-Force Factory Fitness
- X-Force Sports Club
- X-MED COOL LIFE
- X-PAD EMS 홈트레이닝
- X-PERT Diabetes Digital
- X-Club
- Bedsmart base control
- X-Trim Fitness
- X-Watch 4
- X-Wrist
- X-Wrist
- X.Now
- X20 GYM
- X28 Fitness & Nutrition
- X3 Log
- X3 Tracker
- XA Score
- XACTIVE
- Xanadu Fitness
- Xarepo Live Tracker
- XB
- Xbene Boutique
- XBIKE
- XBRAIN : BRAIN TRANING GAME
- XBX and 5BX
- XC Buddy Meet Manager
- XC Score
- XCADEY
- XCADEY SPORTS
- XCB
- XCDisplay Watch
- XCEL Athletic Lifestyle
- Xcel Fitness
- XCEL Sports and Fitness
- Xcept: Live home workouts
- Xclusive Fitness
- XclusiveCut
- Xcross Fitness
- XDF
- XEE-FIT
- XEE-KIDS
- XENA
- Xenhouse
- Xenial Fitness
- Xercise4Less Gyms
- Xert EBC
- XESS
- XFA Fitness - Rippedism
- XFat - fat & weight tracker
- XFit Armour
- XFIT CLUB
- RX20
- XFT-2003J
- XFT-2003JP
- XFT-iTrain
- XFUSION Academia
- XG Scale
- XGT Fitness
- Xhale
- XHALE
- Xhuma
- Mi Fitness (Xiaomi Wear Lite)