Everything you need to actually learn
Nibbler is built on real learning science and thoughtful design — not just pretty flashcards and empty streaks.
Deeply Personalized
Before your first lesson, Nibbler runs a quick 3-minute interview. Your goals, reading speed, learning style, and schedule — all factored in before lesson one. And it keeps adapting as you go.
5-Minute Daily Lessons
Short enough to fit between your alarm and your coffee. Each lesson is crafted to cover exactly one key idea from your content — dense enough to matter, short enough to stick.
Spaced Repetition
Nibbler's scheduling algorithm resurfaces concepts at exactly the right time — just as you're about to forget them. This is the same technique used by top language learners and medical students.
Upload Anything
PDF, EPUB, article URL, or plain text paste. If you can read it, Nibbler can learn from it. No proprietary formats, no walled garden — your library, your rules.
Smart Quizzes
After each lesson, a short quiz tests your recall — not just "did you read this?" but "can you explain this in your own words?" Active recall is the most powerful learning technique we know.
Streaks & Rewards
Your orange cat companion tracks your daily habit. Hit your streak goals and unlock cute animations, milestone badges, and the quiet satisfaction of knowing you showed up.
AI That Gets Smarter
Every interaction — which lessons you found hard, which quizzes you aced, which topics you skipped — feeds back into your personal model. The longer you use Nibbler, the sharper it gets.
Progress Dashboard
See which books you've covered, which concepts you've mastered, and where the gaps are. Visual, motivating, and genuinely useful for tracking your reading goals.
Smart Reminders
Nibbler learns the time of day you're most likely to actually do your lesson and nudges you then. Not a generic 9am push. A nudge that knows you.
Offline Mode
No wifi on your commute? No problem. Nibbler pre-loads your next 3 lessons so you can learn anywhere, anytime.
Multilingual Support
Lessons are generated in the language you choose. Upload a Spanish book and learn in English, or the other way around. Perfect for language learners and global readers alike.
Private & Secure
Your books and notes are yours alone. We encrypt all uploads at rest and in transit, and we never sell your reading data. Ever.
Not just another summary app
Summaries tell you what a book says. Nibbler teaches you what it means — for you, in your context, at the right pace.
Ready to see it in action?
Download the app and start your first lesson in under 3 minutes.