# FIMMS Operational vs Ring Sizer App

The clearest difference is in-app purchases: FIMMS Operational at none against Ring Sizer App's 3. FIMMS Operational also leads on device support (3 vs 1) and iOS requirement (15.6 vs 18.0). On price and ads there is nothing between them.

Both are free to download. Ring Sizer App sells 3 in-app purchases, starting at $3.99 per 7 days. FIMMS Operational asks for nothing beyond the download.

## The numbers

| Metric | FIMMS Operational | Ring Sizer App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Size | 46 MB | 27 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [United Nations Global Service Centre](https://appshunter.io/developer/1523439852) | [Pawel Boguta](https://appshunter.io/developer/1869212018) |

## What reviewers say

### FIMMS Operational

[App page](https://appshunter.io/ios/app/fimms-operational/id1624713414)

**In-app purchases:** none


### Ring Sizer App

[App page](https://appshunter.io/ios/app/ring-sizer-app-size-measure/id6774013425)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $3.99 | per 7 days |
| Premium Annual | $12.99 | per year |
| Premium Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is FIMMS Operational free?

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

### Is Ring Sizer App free?

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

### Do FIMMS Operational or Ring Sizer App have ads?

Neither FIMMS Operational nor Ring Sizer App 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.*