# PRO.4 M vs Seyforum

The clearest difference is update cadence: PRO.4 M at every 8 days against Seyforum's every 5 months. PRO.4 M also leads on device support. Seyforum's advantage is iOS requirement (11.0 vs 15.1). On price 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.

PRO.4 M ships an update every 8 days, Seyforum every 5 months. The most recent releases landed on September 18, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | PRO.4 M | Seyforum |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | **Every 8 days** | Every 5 months |
| Size | 46 MB | 61 MB |
| Requires iOS | 15.1 | **11.0** |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 17+ |
| Developer | [Pro-Bit PRO.4 d.o.o.](https://appshunter.io/developer/1071235078) | [Seyfor d.o.o.](https://appshunter.io/developer/1276162369) |

## What reviewers say

### PRO.4 M

[App page](https://appshunter.io/ios/app/pro4-m/id1207273091)

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

**In-app purchases:** none


### Seyforum

[App page](https://appshunter.io/ios/app/seyforum/id6468772435)

**In-app purchases:** none


## Frequently asked questions

### Is PRO.4 M free?

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

### Is Seyforum free?

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

### Which is updated more often, PRO.4 M or Seyforum?

PRO.4 M ships an update every 8 days, and Seyforum every 5 months. Most recently, PRO.4 M was updated on September 18, 2026 and Seyforum on September 13, 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.*