Paid AI Tools

Language Learning: Pingo AI

AI‑powered language learning app with personalized lessons, real‑time feedback, and progress tracking.

Labster

★ 4.5

AI virtual science labs for biology, chemistry, and physics experiments

Langotalk

★ 4.6

AI conversation partner for practicing 8 languages with real corrections

Khan Academy Kids

Free educational app with interactive lessons and games for children ages 2‑7.

Kiddopia: Kids Learning Games

Kiddopia provides fun, curriculum‑aligned games for kids to learn letters, numbers, and basic skills on iOS.

Khanmigo for Teachers

★ 4.2

AI-powered K-12 LMS used by 20M+ users with personalized learning paths and early intervention analytics

Knewton Alta

★ 4.2

AI adaptive courseware for higher education math and science with 15+ years of learning data

Knowji

★ 4.6

AI vocabulary app for GRE, SAT, TOEFL with spaced repetition

Justin Guitar Lessons & Songs

Mobile app offering video guitar lessons, song library, and practice tools based on the Justin Guitar method.

Kahoot! Play & Create Quizzes

Create, play, and share interactive quizzes on Kahoot! across iOS, Android, and web.