# ATRIS vs GCM

The clearest difference is update cadence: GCM at weekly against ATRIS's every 11 months. ATRIS's advantage is iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

ATRIS ships an update every 11 months, GCM weekly. Both last shipped on October 9, 2026.

## The numbers

| Metric | ATRIS | GCM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Weekly** |
| Size | 37 MB | 59 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ISAGEN](https://appshunter.io/developer/1064239781) | [Instituto Tecnológico ADISIC, S.L.](https://appshunter.io/developer/1644747155) |

## What reviewers say

### ATRIS

[App page](https://appshunter.io/ios/app/atris/id1064239782)

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

**In-app purchases:** none


### GCM

[App page](https://appshunter.io/ios/app/gcm/id1644747153)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ATRIS free?

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

### Is GCM free?

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

### Do ATRIS or GCM have ads?

Neither ATRIS nor GCM shows ads.

### Which is updated more often, ATRIS or GCM?

ATRIS ships an update every 11 months, and GCM weekly. Most recently, ATRIS was updated on October 9, 2026 and GCM on October 9, 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.*