- BTA Eesti
- BTA Latvija
- BTA Lietuva
- BTArtApp
- BTC Fitness
- BTFIT: Personal trainer online
- BTM
- BTM Assist
- BTMon Plus
- BTMon Pro
- BTRIBALFIT
- Btru and Bells Life
- BTSV Eintracht von 1895 e.V.
- BTT™ Health
- BTX
- BU CampusRec
- BU-Touch
- BUBA Baseball App
- Bubble Bubble Tea House
- Bubble shoot - Ball shoot
- Bubble Travel - Fun
- Bubble: Breathing Companion
- Bubtag
- Buchinger Wilhelmi Amplius
- Bucket List 127 – Memories, not just dreams!
- Buckeye Gymnastics
- Buckeye Valley Family YMCA
- Bucknell University Recreation
- Bucks & Hunterdon YMCAs
- BUCS Play
- Budapest Sport App
- Budapest Trails
- Budd
- Buddha Beach Hot Yoga & Co.
- Buddha Box
- Buddha Wisdom: Buddhism Guide
- Buddhist Lists
- Buddhist Mind Meditation
- Buddy Expert
- BUDDY Service App
- BuddyCare
- BuddyConnect
- BuddyCare
- BuddyConnect
- Buddyfit: Fitness & Yoga
- Buderer Drug RX
- Budget Contacts: Buy Contacts
- Budokan Sports and Arts
- Budovideos, inc.
- Buenaventura Sports Club
- Buff and Bare
- Buff Chick Supplements
- Buffalo Rehab Group
- BUG-CAMERA
- BugBuster 3000
- BUGI WELLNESS
- Build Confidence with AJ
- Build Habits Goal Tracking App
- Build Muscle At Home Easily
- Build Muscle Strength Training
- Build With Chels
- Build Your Body-Personal Coach