# Post Quantum Secure Chat vs Hermes Private Messenger

The clearest difference is in-app purchases: Hermes Private Messenger at none against Post Quantum Secure Chat's 2. Post Quantum Secure Chat's advantage is update cadence (every 10 days vs monthly) and iOS requirement (13.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Post Quantum Secure Chat sells 2 in-app purchases, starting at $4.99 per month. Hermes Private Messenger asks for nothing beyond the download.

Post Quantum Secure Chat ships an update every 10 days, Hermes Private Messenger monthly. The most recent releases landed on October 21, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Post Quantum Secure Chat | Hermes Private Messenger |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Monthly |
| Size | 35 MB | 813 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [SAYMATIK BILISIM VE TEKNOLOJI ANONIM SIRKETI](https://appshunter.io/developer/1652317997) | [Enrique Ivars](https://appshunter.io/developer/1867867325) |

## What reviewers say

### Post Quantum Secure Chat

[App page](https://appshunter.io/ios/app/post-quantum-secure-chat/id6743000247)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $4.99 | per month |
| Annual Subscription | $29.99 | per year |


### Hermes Private Messenger

[App page](https://appshunter.io/ios/app/hermes-private-messenger/id6761479476)

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

**In-app purchases:** none


## Frequently asked questions

### Is Post Quantum Secure Chat free?

Post Quantum Secure Chat is free to download, with in-app purchases available.

### Is Hermes Private Messenger free?

Hermes Private Messenger is free to download, with no in-app purchases.

### Do Post Quantum Secure Chat or Hermes Private Messenger have ads?

Neither Post Quantum Secure Chat nor Hermes Private Messenger shows ads.

### Which is updated more often, Post Quantum Secure Chat or Hermes Private Messenger?

Post Quantum Secure Chat ships an update every 10 days, and Hermes Private Messenger monthly. Most recently, Post Quantum Secure Chat was updated on October 21, 2026 and Hermes Private Messenger on October 12, 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.*