Train your brain

Master
mental math.
Anywhere.

The privacy-first mental math trainer. Sharpen your mind and track your progress. Nothing ever leaves your phone.

Download on the
App Store
Current streak
12
Days on fire
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Privacy first

Local-only architecture. Your training data never leaves your phone.

Rapid progress

Master multiplication, percentages, and division. Adaptive practice targets your weak spots.

Gamified growth

Build streaks, unlock achievements, and watch your progress grow.

The Tengri Vertex promise

Built by the engineering team at Tengri Vertex. We ship mission-critical software for government and enterprise. Your brain training gets the same rigor.