Personal STEM Brain
Build your own knowledge operating system.
Practice cards daily, save weak concepts, and watch your mastery graph grow over time. Everything is scoped to your account.
What you get
Adaptive practice
Review what you don't know yet and reinforce what you do.
Saved concept queue
Pin weak concepts and track your improvement over time.
Personal knowledge vault
Write and manage your own private notes and frameworks.
Knowledge graph
See how concepts connect and spot your weak links visually.
Private by default
All data is isolated to your account — nothing is shared.