# Kusur vs Tref

The clearest difference is update cadence: Tref at weekly against Kusur's every 3 weeks. 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.

Kusur ships an update every 3 weeks, Tref weekly. The most recent releases landed on October 11, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Kusur | Tref |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Size | 61 MB | 78 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Imperea](https://appshunter.io/developer/1546353249) | [LUXVORT](https://appshunter.io/developer/6812505796) |

## What reviewers say

### Kusur

[App page](https://appshunter.io/ios/app/kusur/id6444423735)

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

**In-app purchases:** none


### Tref

[App page](https://appshunter.io/ios/app/tref/id6812505794)

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

**In-app purchases:** none


## Frequently asked questions

### Is Kusur free?

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

### Is Tref free?

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

### Do Kusur or Tref have ads?

Neither Kusur nor Tref shows ads.

### Which is updated more often, Kusur or Tref?

Kusur ships an update every 3 weeks, and Tref weekly. Most recently, Kusur was updated on October 11, 2026 and Tref on October 19, 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.*