Pythagorus doodlus
Visual triangle calculator
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Created for a carpenter and an architect, Pythagorus doodlus makes solving triangles simple and visual.
Solve any triangle with ease — instantly and visually.
Pythagorus doodlus is designed for anyone who works with triangles every day: engineers, builders, surveyors, students, and curious minds. The app was originally created for a friend who is a carpenter and for my sister, an architect — and it shows. Every feature is built to be practical, intuitive, and genuinely helpful in real‑world situations.
Enter any combination of sides or angles, and the app calculates the rest in real time. Watch the triangle update as you type or adjust values. And if a triangle is impossible to construct, the app doesn’t just say “error.”
It visually explains why the triangle can’t exist and provides a clear, simple reason. Perfect for learning, teaching, or avoiding mistakes on the job.
Features
• Hand‑drawn design
A unique interface that looks and feels like sketching a triangle on paper.
• Interactive triangle editor
Tap a side or angle to edit it, then enter its value using the built‑in keyboard.
• Smart geometry engine
Automatically solves triangles from any valid combination of sides and angles.
• Invalid triangle detection
If the values don’t form a real triangle, the app shows a visual explanation and tells you exactly why it doesn’t work.
• Drag‑to‑reshape
Drag the triangle’s corners to shape it freely before entering side or angle values — a simple way to visualize the triangle you’re working on.
• Quick shortcuts
Double‑tap an angle to toggle 90°, or reset values instantly.
• Step‑by‑step tutorial
A friendly guided walkthrough shows you how to edit sides, adjust angles, use shortcuts, and create new triangles.
Whether you’re on a construction site, at your drafting table, or studying geometry, Pythagorus doodlus gives you a playful and powerful way to understand and work with triangles.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Now available in Spanish, French and German
The developer, Stéphan Barbé, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Stephan Barbe
- Size
- 7.1 MB
- Category
- Productivity
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- iPhone
- Languages
English and 3 more
- English, French, German, Spanish
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Premium $4.99
- Copyright
- © Stéphan Barbé
