# OneKit vs Ring Sizer

The clearest difference is in-app purchases: Ring Sizer at none against OneKit's 3. Ring Sizer also leads on iOS requirement (15.1 vs 18.6). On price, update cadence, ads 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. Ring Sizer asks for nothing beyond the download.

OneKit ships an update every 3 weeks, Ring Sizer every 2 weeks. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | OneKit | Ring Sizer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 5 MB | 49 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Olekcii Ponomarenko](https://appshunter.io/developer/1577090637) | [Yaroslav Trofimov](https://appshunter.io/developer/1851395994) |

## 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 |


### 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 OneKit free?

OneKit 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 OneKit or Ring Sizer have ads?

Neither OneKit nor Ring Sizer shows ads.

### Which is updated more often, OneKit or Ring Sizer?

OneKit ships an update every 3 weeks, and Ring Sizer every 2 weeks. Most recently, OneKit was updated on October 13, 2026 and Ring Sizer on October 7, 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.*