Question: Can you recommend a learning platform that uses spaced repetition to optimize study time?

If you're looking for a service that incorporates spaced repetition to get the most out of your study time, Quizlet is a great option. It's got a range of tools, including Magic Notes that can turn notes into flashcards, an AI-powered tutor for personalized help, and a variety of study modes. It also incorporates learning science techniques like spaced repetition, retrieval practice and guidance fading to help you retain information over the long term. Quizlet is free, but you can upgrade to Quizlet Plus for a few extra features.

Another good option is Knowt. The service lets you turn notes into flashcards and practice quizzes, and it offers unlimited free learning mode, practice quizzes and spaced repetition. Knowt's tools, like a video summarizer, AI-generated notes and the ability to import Quizlet sets, make it easy to drill flashcards at the most efficient intervals and review them at the best times.

If you want to go more AI-heavy, Gizmo uses AI-generated flashcards and spaced repetition to help you learn and retain information. The service is designed to improve your learning abilities by taking flashcard creation out of your hands, letting you focus on active recall and quiz yourself daily. Gizmo also lets you study socially by connecting with friends.

Last, RemNote is an all-in-one study tool with flashcards, note-taking, PDF annotation and spaced repetition. It uses evidence-based memory techniques to ensure flashcards come back at the best times for retention, so you can study less and remember more.