# Ring Sizer vs Knuckle

The clearest difference is iOS requirement: Ring Sizer at 17.6 against Knuckle's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Ring Sizer sells 1 one-off in-app purchase and Knuckle sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Ring Sizer | Knuckle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Size | 20 MB | 12 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 12+ | 4+ |
| Developer | [Bouazza El Amri](https://appshunter.io/developer/1834967332) | [Andrii Bashta](https://appshunter.io/developer/1547467775) |

## What reviewers say

### Ring Sizer

[App page](https://appshunter.io/ios/app/ring-sizer-size-measure-tool/id6762054266)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime access | $4.99 | one-time |


### Knuckle

[App page](https://appshunter.io/ios/app/knuckle-ring-sizer/id6780806994)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Knuckle Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is Ring Sizer free?

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

### Is Knuckle free?

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

### Do Ring Sizer or Knuckle have ads?

Neither Ring Sizer nor Knuckle shows ads.

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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.*