Khan Academy vs Lumastery

Khan Academy is a free learning platform for independent learners, teachers and parents, available on Android, iOS and the web. It offers more than 840 free courses in core academic subjects for K–12 and early college, with personalized learning intended to help students master concepts and address learning gaps. The mobile app includes interactive exercises, mastery levels, synced progress, offline video downloads and a scratchpad. Khan Academy Kids is a free, ad-free app for children ages 2–8 with interactive books, games and creative lessons. Khanmigo tutoring guides learners toward answers across academic subjects from elementary school through college. Teacher tools can assist with lesson planning, feedback, student work summaries, rubrics and exit tickets; Khan Academy for Teachers also includes standards-aligned practice, progress tracking and AI support. Teachers can import Google Classroom rosters, while district plans list Clever or ClassLink rostering and single sign-on. Paid Khanmigo subscriptions require users to be at least 18, live in the United States and have a U.S. billing address. Parent and learner subscriptions each cost $4 a month.

Lumastery is a homeschool web app with lessons and adaptive practice in math and reading, plus on-screen science lessons. It is designed for families managing children at different ages and learning levels. Practice difficulty responds to a child's recent answers and can return to foundational skills. A skill is marked mastered at 85% across the last 10 attempts; spaced review revisits skills over time, except arithmetic-chain skills. The Family plan allows a choice of traditional or conceptual math instruction for each child. Listed curriculum includes 238 math lessons, 157 structured reading lessons, and 117 on-screen K–8 science lessons. Science is not lab work; literature has three pilot chapters, writing assignments are a parent-graded pilot, and world languages are not offered. The free plan is described as one child and one daily session. Family is listed at $19.99 a month or $199 per year, with up to four children and unlimited sessions, but checkout is not live and the plan cannot be bought or trialed. The public beta has ended, new registrations are closed, and the app is unavailable to families during its wind-down.