# RingMeter vs DIAMETRO

The clearest difference is in-app purchases: DIAMETRO at none against RingMeter's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. RingMeter sells 4 in-app purchases, starting at $1.99 per 7 days. DIAMETRO asks for nothing beyond the download.

RingMeter ships an update every 10 days, DIAMETRO every 2 weeks. The most recent releases landed on September 30, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | RingMeter | DIAMETRO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 2 weeks |
| Size | 2 MB | 4 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ZHENGQIAO JIANG](https://appshunter.io/developer/1892168889) | [ALEXANDRU TEODOR TRANDAFIR](https://appshunter.io/developer/6810555118) |

## What reviewers say

### RingMeter

[App page](https://appshunter.io/ios/app/ringmeter-ring-size-finder/id6767339352)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.99 | per 7 days |
| Monthly | $4.99 | per month |
| Yearly | $29.99 | per year |
| Lifetime | $79.99 | one-time |


### DIAMETRO

[App page](https://appshunter.io/ios/app/diametro-ring-sizer/id6810555116)

**In-app purchases:** none


## Frequently asked questions

### Is RingMeter free?

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

### Is DIAMETRO free?

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

### Do RingMeter or DIAMETRO have ads?

Neither RingMeter nor DIAMETRO shows ads.

### Which is updated more often, RingMeter or DIAMETRO?

RingMeter ships an update every 10 days, and DIAMETRO every 2 weeks. Most recently, RingMeter was updated on September 30, 2026 and DIAMETRO on October 4, 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.*