# KL500A vs Ring Sizer

The clearest difference is in-app purchases: KL500A at none against Ring Sizer's 6. KL500A also leads on iOS requirement (11.0 vs 13.4). Ring Sizer's advantage is update cadence (every 4 days vs every 4 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Ring Sizer sells 6 in-app purchases, starting at $2.99 per 7 days. KL500A asks for nothing beyond the download.

KL500A ships an update every 4 weeks, Ring Sizer every 4 days. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | KL500A | Ring Sizer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 4 days** |
| Size | 31 MB | 46 MB |
| Requires iOS | **11.0** | 13.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [磊磊 周](https://appshunter.io/developer/1708841052) | [Fabrizio Beccaceci](https://appshunter.io/developer/1772065340) |

## What reviewers say

### KL500A

[App page](https://appshunter.io/ios/app/kl500a/id6470735168)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ring Sizer

[App page](https://appshunter.io/ios/app/ring-sizer-your-ring-size/id6736466968)

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ring Sizer Pro | $2.99 | per 7 days |
| Ring Sizer Pro | $5.99 | per month |
| Ring Sizer Pro | $6.99 | per month |
| Ring Sizer Pro | $29.99 | per year |
| RingSizer Lifetime | $14.99 | one-time |
| RingSizer Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is KL500A free?

KL500A is free to download, with no in-app purchases.

### Is Ring Sizer free?

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

### Do KL500A or Ring Sizer have ads?

Neither KL500A nor Ring Sizer shows ads.

### Which is updated more often, KL500A or Ring Sizer?

KL500A ships an update every 4 weeks, and Ring Sizer every 4 days. Most recently, KL500A was updated on October 7, 2026 and Ring Sizer on October 2, 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.*