# Prof Pref vs T

The clearest difference is update cadence: T at every 4 days against Prof Pref's every 6 months. 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.

Prof Pref ships an update every 6 months, T every 4 days. The most recent releases landed on September 7, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Prof Pref | T |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 days** |
| Size | 1 MB | 35 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vitaly Kulagin](https://appshunter.io/developer/1524623012) | [LEDUSIO LTD](https://appshunter.io/developer/1875523721) |

## What reviewers say

### Prof Pref

[App page](https://appshunter.io/ios/app/prof-pref/id1662598113)

**Features:** macOS Compatibility

**In-app purchases:** none


### T

[App page](https://appshunter.io/ios/app/t-one/id6758886090)

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

**In-app purchases:** none


## Frequently asked questions

### Is Prof Pref free?

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

### Is T free?

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

### Do Prof Pref or T have ads?

Neither Prof Pref nor T shows ads.

### Which is updated more often, Prof Pref or T?

Prof Pref ships an update every 6 months, and T every 4 days. Most recently, Prof Pref was updated on September 7, 2026 and T on September 8, 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.*