Circle Judge - Roundness Check
Draw a circle, get a score
Free · Designed for iPad
Draw a circle freehand and get its roundness (circularity) scored.
The app analyzes your stroke automatically and instantly shows how close it is to a perfect circle in percent.
● Features
* One-tap scoring: draw a circle and lift your finger—shows 0–100% roundness
* Easy comparison: overlays a same-size reference circle (toggle on/off)
* Customization: freely choose pen color and guide color
* Simple sharing: share the drawn circle as an image with the score
* Appearance: supports Light/Dark Mode
● Great for
* Practicing steady, freehand circles
* Visualizing and improving hand jitter in design/sketching
* Having fun “roundness challenges” with friends and family
● How to use
1. Trace a circle with your finger on the screen
2. Lift your finger to auto-score and show the reference circle
3. Tap Share to send a square image with the score
Ratings & Reviews
The developer, MITSUKO MARGOT KUBOTA ONO, 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:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- MITSUKO MARGOT KUBOTA ONO
- Size
- 5.4 MB
- Category
- Graphics & Design
- Compatibility
Requires iOS 16.6 or later.
- iPhone
Requires iOS 16.6 or later. - iPad
Requires iPadOS 16.6 or later. - Mac
Requires macOS 13.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © MITSUKO ONO