# OPI Chieti vs Metamer

The clearest difference is iOS requirement: OPI Chieti at 12.0 against Metamer's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

OPI Chieti ships an update fortnightly, Metamer every 3 weeks. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | OPI Chieti | Metamer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 34 MB | 15 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SWD Group S.r.l.](https://appshunter.io/developer/1493065665) | [METAMER SRL](https://appshunter.io/developer/1136260510) |

## What reviewers say

### OPI Chieti

[App page](https://appshunter.io/ios/app/opi-chieti/id6736354534)

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

**In-app purchases:** none


### Metamer

[App page](https://appshunter.io/ios/app/metamer/id6745890459)

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

**In-app purchases:** none


## Frequently asked questions

### Is OPI Chieti free?

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

### Is Metamer free?

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

### Do OPI Chieti or Metamer have ads?

Neither OPI Chieti nor Metamer shows ads.

### Which is updated more often, OPI Chieti or Metamer?

OPI Chieti ships an update fortnightly, and Metamer every 3 weeks. Most recently, OPI Chieti was updated on November 4, 2026 and Metamer on October 30, 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.*