- KLMoji by KL Rahul
- Klokan App
- Klosterfrau mio
- Klosterneuburg App
- KloudTalk Smart Business Phone
- KLUB
- Klub Affaires
- Klub Przedsiębiorczości
- Klubraum
- Klup - Social App
- Kl空聊
- KM - Yolculuğunu Paylaş
- Kmate - Chat with global
- KMB Anliegen
- KMD Nexus Video II
- KMentor
- KMK Medlem
- KNA365
- Knack - Tutoring Simplified
- Knackel
- Knackel
- Knatree
- Knaukey
- KNECHT - CuttingEdgeTechnology
- Kfans - KPop & KDrama Fandom
- Knit Camp
- Knnkt
- KnoCard
- Knock
- Knock Knock SocialFi
- Knock Me Chat
- Knockk : Make friends & Outing
- KnockKnock.
- Knocknock: Tell Your Story
- KnokKnok: Vanishing Invites
- Knot Perfect: Social Media
- Know Me? - Quiz Your Friends
- Know your neighbour
- Know&Share
- Knowhere: Connect With Friends
- Knowledgeworker Share
- KnowledgeWorks Community
- Knowticed
- Knowunity: Die Lernapp
- KNU PCPA 원우수첩
- Knubia
- Knuddels Chat & Freunde finden
- KNVB Eén Tweetje
- Koala!
- Koalie
- KOC - Review là có tiền
- Kocaeli Barosu
- Kocaeli Platformu
- EasyCalls: Calling App
- Kodure - 子連れオフ会アプリ
- KoeTra
- KOG Go!
- KOGO by Mappls