# OneKit vs Photo Ruler

The clearest difference is update cadence: Photo Ruler at weekly against OneKit's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. OneKit sells 3 in-app purchases, starting at $2.99 per 7 days and Photo Ruler sells 1 in-app purchase, starting at $6.99 per year. Whichever you choose, the download price is not the number that matters.

OneKit ships an update every 3 weeks, Photo Ruler weekly. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | OneKit | Photo Ruler |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Size | 5 MB | 6 MB |
| Requires iOS | 18.6 | **18.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Olekcii Ponomarenko](https://appshunter.io/developer/1577090637) | [Ihar Shaduryn](https://appshunter.io/developer/988578285) |

## What reviewers say

### OneKit

[App page](https://appshunter.io/ios/app/onekit-smart-digital-toolbox/id6757952765)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly subscription | $2.99 | per 7 days |
| Monthly subscription | $9.99 | per month |
| Yearly subscription | $49.99 | per year |


### 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 |


## Frequently asked questions

### Is OneKit free?

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

### Is Photo Ruler free?

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

### Do OneKit or Photo Ruler have ads?

Neither OneKit nor Photo Ruler shows ads.

### Which is updated more often, OneKit or Photo Ruler?

OneKit ships an update every 3 weeks, and Photo Ruler weekly. Most recently, OneKit was updated on October 31, 2026 and Photo Ruler 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.*