# SKI+ v2 Prem vs Post Quantum Secure Chat

The clearest difference is in-app purchases: SKI+ v2 Prem at none against Post Quantum Secure Chat's 2. Post Quantum Secure Chat's advantage is iOS requirement (13.0 vs 17.6). On price, update cadence, 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. SKI+ v2 Prem asks for nothing beyond the download.

SKI+ v2 Prem ships an update every 2 weeks, Post Quantum Secure Chat every 10 days. The most recent releases landed on September 15, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | SKI+ v2 Prem | Post Quantum Secure Chat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 10 days** |
| Size | 248 MB | 35 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Academia Sinica Research Center for Information Technology Innovation](https://appshunter.io/developer/432286895) | [SAYMATIK BILISIM VE TEKNOLOJI ANONIM SIRKETI](https://appshunter.io/developer/1652317997) |

## What reviewers say

### SKI+ v2 Prem

[App page](https://appshunter.io/ios/app/ski-plus-v2-prem/id6654902944)

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is SKI+ v2 Prem free?

SKI+ v2 Prem is free to download, with no in-app purchases.

### Is Post Quantum Secure Chat free?

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

### Do SKI+ v2 Prem or Post Quantum Secure Chat have ads?

Neither SKI+ v2 Prem nor Post Quantum Secure Chat shows ads.

### Which is updated more often, SKI+ v2 Prem or Post Quantum Secure Chat?

SKI+ v2 Prem ships an update every 2 weeks, and Post Quantum Secure Chat every 10 days. Most recently, SKI+ v2 Prem was updated on September 15, 2026 and Post Quantum Secure Chat on September 6, 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.*