FullRecall
7.4#5 in adaptive learning softwareFree planFree planAndroidiOSWebLinux
VisitFullRecall suits learners who want to retain facts through repeated question-and-answer reviews. It may also suit people who want to import study data or use a portable installation.
Khan Academy suits learners looking for free courses, as well as teachers and parents seeking learning or classroom resources. Khan Academy Kids is for children ages 2–8; paid Khanmigo options have U.S. and age requirements.