# bac | باك vs QST قست

The clearest difference is update cadence: bac | باك at fortnightly against QST قست's every 6 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.

bac | باك ships an update fortnightly, QST قست every 6 weeks. The most recent releases landed on November 9, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | bac | باك | QST قست |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 6 weeks |
| Size | 117 MB | 51 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Cashbac, CO.](https://appshunter.io/developer/1874674182) | [hogr ali](https://appshunter.io/developer/1637632090) |

## What reviewers say

### bac | باك

[App page](https://appshunter.io/ios/app/bac/id6758734745)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### QST قست

[App page](https://appshunter.io/ios/app/qst/id6801359472)

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

**In-app purchases:** none


## Frequently asked questions

### Is bac | باك free?

bac | باك is free to download, with no in-app purchases.

### Is QST قست free?

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

### Do bac | باك or QST قست have ads?

Neither bac | باك nor QST قست shows ads.

### Which is updated more often, bac | باك or QST قست?

bac | باك ships an update fortnightly, and QST قست every 6 weeks. Most recently, bac | باك was updated on November 9, 2026 and QST قست on November 6, 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.*