# Photo Ruler vs Ring Sizer

The clearest difference is in-app purchases: Ring Sizer at none against Photo Ruler's 1. Ring Sizer also leads on iOS requirement (15.1 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Photo Ruler sells 1 in-app purchase, starting at $6.99 per year. Ring Sizer asks for nothing beyond the download.

Photo Ruler ships an update weekly, Ring Sizer every 2 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | Photo Ruler | Ring Sizer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Size | 6 MB | 49 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ihar Shaduryn](https://appshunter.io/developer/988578285) | [Yaroslav Trofimov](https://appshunter.io/developer/1851395994) |

## What reviewers say

### Photo Ruler

[App page](https://appshunter.io/ios/app/photo-ruler-measure-objects/id6792457241)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Paper Image Meter Unlimited | $6.99 | per year |


### Ring Sizer

[App page](https://appshunter.io/ios/app/ring-sizer-measure-ruler/id6793472743)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Photo Ruler free?

Photo Ruler is free to download, with in-app purchases available.

### Is Ring Sizer free?

Ring Sizer is free to download, with no in-app purchases.

### Do Photo Ruler or Ring Sizer have ads?

Neither Photo Ruler nor Ring Sizer shows ads.

### Which is updated more often, Photo Ruler or Ring Sizer?

Photo Ruler ships an update weekly, and Ring Sizer every 2 weeks. Most recently, Photo Ruler was updated on October 25, 2026 and Ring Sizer on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*