Build lasting knowledge, layer by layer
Layers of Knowledge is an intelligent spaced repetition app built on the science of the Ebbinghaus Forgetting Curve. It helps you retain any information — facts, vocabulary, concepts, professional knowledge — through perfectly timed review notifications.
Spaced repetition is a learning technique based on the Ebbinghaus Forgetting Curve. The app sends you review reminders at scientifically optimal intervals (1, 3, 7, 14, 30, 90, and 180 days) to help you move information into long-term memory.
Absolutely. All your data stays on your device. We don't require an account, don't collect any personal information, and don't have access to your knowledge items.
Yes! You can pause all notifications for a custom duration (vacation mode). When you resume, all your review schedules are automatically adjusted so you don't miss anything.
Yes. In addition to the default schedule, you can create your own reviewing schedules with custom intervals tailored to your learning needs.
Yes! You can export all your knowledge items as a JSON file for backup or transfer, and import them on any device running the app.
Yes! Use the Relearn feature to restart any item's review cycle from the beginning. This is perfect for information that needs reinforcement.
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