# RezerwujKort.pl vs Red Line Studio

The clearest difference is update cadence: RezerwujKort.pl at every 3 weeks against Red Line Studio's every 8 months. Red Line Studio's advantage is iOS requirement (12.0 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.

RezerwujKort.pl ships an update every 3 weeks, Red Line Studio every 8 months. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | RezerwujKort.pl | Red Line Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 8 months |
| Size | 30 MB | 34 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Damian Chmurzyski](https://appshunter.io/developer/1723055084) | [GYMMANAGER SP Z O O](https://appshunter.io/developer/966545442) |

## What reviewers say

### RezerwujKort.pl

[App page](https://appshunter.io/ios/app/rezerwujkortpl/id6475010687)

**Features:** macOS Compatibility

**In-app purchases:** none


### Red Line Studio

[App page](https://appshunter.io/ios/app/red-line-studio/id6476193584)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RezerwujKort.pl free?

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

### Is Red Line Studio free?

Red Line Studio is free to download, with no in-app purchases.

### Do RezerwujKort.pl or Red Line Studio have ads?

Neither RezerwujKort.pl nor Red Line Studio shows ads.

### Which is updated more often, RezerwujKort.pl or Red Line Studio?

RezerwujKort.pl ships an update every 3 weeks, and Red Line Studio every 8 months. Most recently, RezerwujKort.pl was updated on October 24, 2026 and Red Line Studio on October 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.*