# Vibration function check vs hark

The clearest difference is ads: hark at none against Vibration function check's shown. On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Vibration function check | hark |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | — | Every 3 days |
| Size | 7 MB | 46 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yasushi Tauchi](https://appshunter.io/developer/1819284921) | [Ryan Vogel](https://appshunter.io/developer/1680057141) |

## What reviewers say

### Vibration function check

[App page](https://appshunter.io/ios/app/vibration-function-check/id6770183889)

**In-app purchases:** none


### hark

[App page](https://appshunter.io/ios/app/hark-developer-notifications/id6794121509)

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

**In-app purchases:** none


## Frequently asked questions

### Is Vibration function check free?

Vibration function check is free to download, with no in-app purchases.

### Is hark free?

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

### Do Vibration function check or hark have ads?

Vibration function check shows ads; hark does not.

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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.*