# 4 vs Prosochê

The clearest difference is in-app purchases: 4 at none against Prosochê's 2. Prosochê's advantage is update cadence (every 2 days vs every 7 months) and iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Prosochê sells 2 in-app purchases, starting at $4.99 per month. 4 asks for nothing beyond the download.

4 ships an update every 7 months, Prosochê every 2 days. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 4 | Prosochê |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 days** |
| Size | 3 MB | 39 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Shenzhen Jiufen Information Technology Co., Ltd.](https://appshunter.io/developer/1656332286) | [Neil Ong](https://appshunter.io/developer/6777968962) |

## What reviewers say

### 4

[App page](https://appshunter.io/ios/app/4-7-8-breathe/id6758927414)

**Features:** macOS Compatibility

**In-app purchases:** none


### Prosochê

[App page](https://appshunter.io/ios/app/prosoche/id6777968960)

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

**In-app purchases (2)**

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


## Frequently asked questions

### Is 4 free?

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

### Is Prosochê free?

Prosochê is free to download, with in-app purchases available.

### Do 4 or Prosochê have ads?

Neither 4 nor Prosochê shows ads.

### Which is updated more often, 4 or Prosochê?

4 ships an update every 7 months, and Prosochê every 2 days. Most recently, 4 was updated on October 31, 2026 and Prosochê on October 28, 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.*