# Charge one vs AudioKostel

The clearest difference is update cadence: AudioKostel at every 3 months against Charge one's every 17 months. AudioKostel also leads on iOS requirement (11.0 vs 16.0). 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.

Charge one ships an update every 17 months, AudioKostel every 3 months. Both last shipped on October 15, 2026.

## The numbers

| Metric | Charge one | AudioKostel |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 3 months** |
| Size | 69 MB | 9 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Czech online system s.r.o.](https://appshunter.io/developer/1785868825) | [Petr Hracek](https://appshunter.io/developer/1439587771) |

## What reviewers say

### Charge one

[App page](https://appshunter.io/ios/app/charge-one/id1482575148)

**Features:** macOS Compatibility

**In-app purchases:** none


### AudioKostel

[App page](https://appshunter.io/ios/app/audiokostel/id1522194154)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Charge one free?

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

### Is AudioKostel free?

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

### Do Charge one or AudioKostel have ads?

Neither Charge one nor AudioKostel shows ads.

### Which is updated more often, Charge one or AudioKostel?

Charge one ships an update every 17 months, and AudioKostel every 3 months. Most recently, Charge one was updated on October 15, 2026 and AudioKostel on October 15, 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.*