GeometrAI

GeometrAI is all of high-school geometry, made visual.

LEARN EVERY TOPIC
137 topics, from points and angles to proofs, transformations, similarity, trigonometry, circles, area, volume and probability. Each one starts with the key idea in plain words and a figure you can drag: move a point and watch the angles, lengths and areas change while the rule stays true.

SEE IT IN 3D
Boxes, prisms, pyramids and cones are real 3D figures: drag to turn them, pinch to zoom, drag a corner to resize. Tap "Lay the triangle flat" and the right triangle hidden inside the solid lifts out and lies flat, so the Pythagorean Theorem is right there. The new Diagonals in 3D topic covers box and cube diagonals, missing edges and distance in 3D.

SEE WORKED EXAMPLES
Swipe through fully worked examples, step by step, with the figure drawn to scale.

PRACTICE WITHOUT LIMITS
Every topic makes new problems as long as you want to keep going. Type your answer the way you'd write it (5√2, 12π, 3/8, 40°), get it checked instantly, and see every step of the solution.

DRAW AND MEASURE
The Sandbox is a blank page with points, lines, circles, polygons, angles, midpoints, perpendiculars and parallels — and everything is measured live.

A TUTOR THAT SHOWS, NOT TELLS (optional)
Type a problem or take a picture of a worksheet, and the tutor works it out on the figure: highlighting parts, drawing the construction, animating dilations and rotations, turning 3D solids and lifting their triangles out flat, and writing the math line by line. It speaks only in sentences from the app's own reviewed phrasebook, and the app checks its arithmetic. When it's done, practice more problems just like it. Share a lesson with a friend as a file they can open in GeometrAI.
The tutor uses an AI service of your choice (xAI Grok, OpenAI or Anthropic Claude) with your own API key, added by a parent in Settings. Everything else works offline with no account.

PRIVATE BY DESIGN
No accounts, no ads, no tracking. Progress stays on your phone.