# V4 vs QUALIN Professor

The clearest difference is update cadence: QUALIN Professor at weekly against V4's every 11 months. V4's advantage is iOS requirement (9.1 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

V4 ships an update every 11 months, QUALIN Professor weekly. The most recent releases landed on October 29, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | V4 | QUALIN Professor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Weekly** |
| Size | 32 MB | 83 MB |
| Requires iOS | **9.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [GGE](https://appshunter.io/developer/1198669637) | [Edigar Junior](https://appshunter.io/developer/1177040411) |

## What reviewers say

### V4

[App page](https://appshunter.io/ios/app/v4/id1198669638)

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

**In-app purchases:** none


### QUALIN Professor

[App page](https://appshunter.io/ios/app/qualin-professor/id6747585984)

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

**In-app purchases:** none


## Frequently asked questions

### Is V4 free?

V4 is free to download, with no in-app purchases.

### Is QUALIN Professor free?

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

### Do V4 or QUALIN Professor have ads?

Neither V4 nor QUALIN Professor shows ads.

### Which is updated more often, V4 or QUALIN Professor?

V4 ships an update every 11 months, and QUALIN Professor weekly. Most recently, V4 was updated on October 29, 2026 and QUALIN Professor on September 30, 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.*