# BoltKit vs Sound function check

The clearest difference is in-app purchases: Sound function check at none against BoltKit's 1. Sound function check also leads on iOS requirement (17.6 vs 26.0). BoltKit's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. BoltKit sells 1 one-off in-app purchase. Sound function check asks for nothing beyond the download.

## The numbers

| Metric | BoltKit | Sound function check |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | — |
| Size | 1 MB | 8 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [PAUL SNYMAN](https://appshunter.io/developer/1877896729) | [Yasushi Tauchi](https://appshunter.io/developer/1819284921) |

## What reviewers say

### BoltKit

[App page](https://appshunter.io/ios/app/boltkit/id6759829753)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BoltKit Pro | $8.99 | one-time |


### Sound function check

[App page](https://appshunter.io/ios/app/sound-function-check/id6774851912)

**In-app purchases:** none


## Frequently asked questions

### Is BoltKit free?

BoltKit is free to download, with in-app purchases available.

### Is Sound function check free?

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

### Do BoltKit or Sound function check have ads?

Sound function check shows ads; BoltKit 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.*