- Knows
- KnowVTE Official
- Creda Health
- Knox County YMCA
- Knoxville Academy of Martial
- KnoxxiHealth
- Knuckleheads Boxing
- KNWU Check-In
- Knörnschild Fitness
- KO17 Lacrosse
- KOA Center
- Koala - by FMP
- Koala Ambulatorio
- Koala Nap:Stop Apnea & Snoring
- Koboko Fitness
- Koboskini
- My Cookbook: Save your recipes
- Kockum Fritid
- Kocoon System
- Kocum Benim - Gym Tracker
- KOC안경사협동조합
- Kodiak Taekwondo
- KOEN
- Kohl's Fitness
- Koi Tabata Timer - HIIT Training & Tabata Timer
- KOKO NAILS PTY LTD
- Kolaines Beauty Lounge
- Kolayvet
- KolemPlzne
- Kolmachine
- Kolmovo Fitness
- KOLO Dance
- KOLO+智慧前台
- KoloFit
- Kom i fokus
- Komando Fit & Gym
- KOMBO App
- KOMinator for Strava