Ruler Studio
Ruler, Grid & Ring Sizer
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Measure faster with a clean on-screen ruler, grid, calibration tools, and ring sizing guides. No account required.
Precise measuring tools
Ruler, grid, calibration, and ring sizing in one clean workspace.
Ruler & Grid Studio
High-precision multi-unit rulers with a built-in grid for everyday measurements.
Smart Ring Sizer
Align a real ring with the guide to estimate diameter, circumference, and size.
Card Calibration
Use a standard card edge to improve real-world measurement accuracy.
Free Measuring Toolkit
Full-screen grids, scale presets, and measurement overlays are included for everyone.
Precise ruler, grid, calibration, and ring sizing tools.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Ruler Studio is now completely free. Full-screen grids, scale presets, and measurement overlays are included for everyone.
The developer, Spyridon Bousios, 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
- Spyridon Bousios
- Size
- 19.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Ruler Pro Lifetime $2.99
- Copyright
- © 2026 Spyridon Bousios