# Ruler Studio

> Ruler Studio (iPhone/iPad app by Spyridon Bousios.)

- Source: https://appshunter.io/ios/app/ruler-studio/id6777489772 (this page in markdown: same URL + `.md`)
- Developer: [Spyridon Bousios](https://appshunter.io/developer/1168309944)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 19 MB
- Languages: English
- Released: 2026-06-10
- Data updated: 2026-07-27
- User reviews in markdown: https://appshunter.io/ios/app/ruler-studio/id6777489772/reviews.md

## What is Ruler Studio?

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.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Ruler Pro Lifetime | $2.99 | one-time |



## Version history (last 2 releases)

### 1.0.1 — 2026-07-21

Ruler Studio is now completely free. Full-screen grids, scale presets, and measurement overlays are included for everyone.

### 1.0 — 2026-06-10

No release notes.

## More apps by Spyridon Bousios

- [Amazing Car Jungle Run](https://appshunter.io/ios/app/amazing-car-jungle-run/id1168309945)
- [Mcqueen Highway Racing](https://appshunter.io/ios/app/mcqueen-highway-racing/id1173156937)
- [McQueen Lightning Cars](https://appshunter.io/ios/app/mcqueen-lightning-cars/id1174406542)
- [Dora The explorer of ABC](https://appshunter.io/ios/app/dora-the-explorer-of-abc/id1182699553)
- [Xtreme Runner 3D](https://appshunter.io/ios/app/xtreme-runner-3d/id1324272106)
- [Teeth Brush Timer & Alarm](https://appshunter.io/ios/app/teeth-brush-timer-and-alarm/id1328820991)

All apps by Spyridon Bousios: https://appshunter.io/developer/1168309944

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-27.*