Geometry Handbook
Construct, solve and prove
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Build with compass and straightedge, explore theorems with proofs, and solve geometry problems with to-scale drawings. A handbook for learning by doing.
Geometry Handbook is a geometry workbench for school: build constructions with compass and straightedge, solve triangles and solids with a to-scale drawing, and explore theorems and proofs. The handbook and geometry tools work offline.
CONSTRUCTION LAB
A dynamic geometry board. Place points, draw segments, lines, rays and circles, use the compass, construct perpendiculars, parallels, midpoints, angle bisectors, perpendicular bisectors, intersections and polygons. Drag any free point and everything built from it follows. Lengths, angles and areas are measured live on the drawing. Undo, redo, zoom and pan.
13 CLASSIC CONSTRUCTIONS, STEP BY STEP
The midpoint of a segment, the perpendicular bisector, the angle bisector, perpendiculars and a parallel line, copying an angle, a triangle from three sides, the circumscribed and inscribed circles, the Euler line, tangents from a point and the regular hexagon. Each step is explained; drag the given points to explore the construction.
SOLVER WITH STEPS
Solve a triangle from supported combinations of sides and angles: SSS, SAS, ASA, AAS and SSA, including the ambiguous case with two solutions. Right triangles, regular polygons, circles, arcs, sectors and segments, and the volume and surface area of cubes, boxes, cylinders, cones, spheres, pyramids and frustums. Every answer comes with a drawing to scale, and impossible data gets a clear explanation of why. With Pro, every value is derived step by step: the formula, the numbers substituted and the result.
THE HANDBOOK
184 entries in 21 topics of plane and solid geometry. Each has a precise statement, an illustration, a worked example and the common mistakes. 152 proofs and derivations, 144 calculators, 368 check-yourself questions, a cheat sheet, exact trigonometric values, notation and a problem-solving guide.
AI TUTOR ON YOUR DEVICE
Ask about a theorem or a problem in your own words, or open the tutor from an article to ask about that topic. Scan a problem with the camera or pick a photo. The tutor uses Apple Intelligence on your device; questions and photos stay on it. AI tutoring requires iOS/iPadOS 26 or later on a compatible device with Apple Intelligence enabled and its model ready. AI answers can contain mistakes. The tutor uses a language supported by Apple Intelligence, on-device Apple Translation where available, or English with a short note.
FREE AND PRO
Free: the whole handbook with drawings, proofs, calculators and the cheat sheet; Solver answers with drawings; three guided constructions; three practice rounds a day.
Geometry Pro adds the freeform construction board, all 13 guided constructions, step-by-step Solver solutions, the AI tutor and problem scanner, and unlimited practice.
Monthly and yearly plans are auto-renewing subscriptions; manage or cancel them in App Store settings. Lifetime is a one-time purchase with no automatic renewal.
48 LANGUAGES
The interface and handbook are available in 48 languages, offline. Arabic, Hebrew and Urdu read right to left. AI replies use your language when supported, on-device Apple Translation when available, or English with a short note.
WORKS WITH UNLOCKY
Read three handbook cards and pass a quick check to earn screen time in Unlocky. Requires a version of Unlocky that supports study breaks.
No account, no ads, no tracking. Light and dark themes, iPhone and iPad.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://ultim8digital.github.io/geometry/privacy.html
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Improvements and fixes for a smoother learning experience.
The developer, Oleg Korunov, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Oleg Korunov
- Size
- 143.5 MB
- Category
- Education
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 43 more
- English, Arabic, Bengali, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Gujarati, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Kannada, Korean, Malay, Malayalam, Marathi, Norwegian Bokmål, Oriya, Polish, Portuguese, Punjabi, Romanian, Russian, Simplified Chinese, Slovak, Slovenian, Spanish, Swedish, Tamil, Telugu, Thai, Traditional Chinese, Turkish, Ukrainian, Urdu, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Geometry Pro — Lifetime $19.99
- Geometry Pro · Monthly $1.99
- Geometry Pro · Yearly $9.99
- Copyright
- © 2026 Oleg Korunov
