Download Butterfly

Free AI-powered study tool. No account needed. No subscription. Just download and start learning.

Download for WindowsDownload for Mac

Free · No account needed

Windows
Cognition-Setup-3.1.7.exe · ~45MB
macOS
Cognition-3.1.7-arm64.dmg · ~60MB

Windows SmartScreen notice

Windows may show a SmartScreen warning because we're a new app. This is normal — here's how to proceed:

  1. 1.Click “More info” on the warning
  2. 2.Click “Run anyway” to install

After you install

1
Open Butterfly
Launch the app — it appears as a small pill at the edge of your screen.
2
Start studying
Open your lectures, textbooks, or videos. Butterfly captures what you learn automatically.
3
Get quizzed
Butterfly predicts what you'll forget and quizzes you at the perfect time.

v3.1.7 · Requires Windows 10+ or macOS 12+