# PSiO vs Zen

The clearest difference is update cadence: Zen at every 2 days against PSiO's every 11 months. Zen also leads on device support (6 vs 3). PSiO's advantage is iOS requirement (9.0 vs 17.0). On price, 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.

PSiO ships an update every 11 months, Zen every 2 days. The most recent releases landed on September 16, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | PSiO | Zen |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 days** |
| Size | 25 MB | 25 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Psychomed.com SA](https://appshunter.io/developer/1318018249) | [Francis Dierick](https://appshunter.io/developer/332084019) |

## What reviewers say

### PSiO

[App page](https://appshunter.io/ios/app/psio/id1318018250)

**Features:** macOS Compatibility

**In-app purchases:** none


### Zen

[App page](https://appshunter.io/ios/app/zen-meditation-timer/id6780166288)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is PSiO free?

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

### Is Zen free?

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

### Do PSiO or Zen have ads?

Neither PSiO nor Zen shows ads.

### Which is updated more often, PSiO or Zen?

PSiO ships an update every 11 months, and Zen every 2 days. Most recently, PSiO was updated on September 16, 2026 and Zen on September 29, 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.*