# GCM Mail vs Priyo Authenticator

The clearest difference is update cadence: GCM Mail at every 5 days against Priyo Authenticator's monthly. GCM Mail also leads on iOS requirement (13.0 vs 17.6). 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.

GCM Mail ships an update every 5 days, Priyo Authenticator monthly. The most recent releases landed on October 5, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | GCM Mail | Priyo Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Monthly |
| Size | 31 MB | 33 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [GCM TECH SOLUTIONS](https://appshunter.io/developer/1281520213) | [Md Sayed Abul Kasem](https://appshunter.io/developer/1772150864) |

## What reviewers say

### GCM Mail

[App page](https://appshunter.io/ios/app/gcm-mail/id6749802646)

**Features:** macOS Compatibility

**In-app purchases:** none


### Priyo Authenticator

[App page](https://appshunter.io/ios/app/priyo-authenticator/id6756983053)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GCM Mail free?

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

### Is Priyo Authenticator free?

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

### Do GCM Mail or Priyo Authenticator have ads?

Neither GCM Mail nor Priyo Authenticator shows ads.

### Which is updated more often, GCM Mail or Priyo Authenticator?

GCM Mail ships an update every 5 days, and Priyo Authenticator monthly. Most recently, GCM Mail was updated on October 5, 2026 and Priyo Authenticator on October 18, 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.*