# Ring Sizer vs Knuckle

The clearest difference is in-app purchases: Ring Sizer at none against Knuckle's 1. Ring Sizer also leads on iOS requirement (16.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Knuckle sells 1 one-off in-app purchase. Ring Sizer asks for nothing beyond the download.

## The numbers

| Metric | Ring Sizer | Knuckle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Daily | — |
| Size | 3 MB | 12 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Niharika Jindal](https://appshunter.io/developer/1817697927) | [Andrii Bashta](https://appshunter.io/developer/1547467775) |

## What reviewers say

### Ring Sizer

[App page](https://appshunter.io/ios/app/ring-sizer-perfect-moments/id6766138088)

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

**In-app purchases:** none


### 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 no in-app purchases.

### 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.*