# System Sound vs Invoice Maker

The clearest difference is in-app purchases: System Sound at none against Invoice Maker's 2. System Sound also leads on device support (3 vs 1). Invoice Maker's advantage is ads (none vs shown). On price and iOS requirement there is nothing between them.

Both are free to download. Invoice Maker sells 2 in-app purchases, starting at $6.99 per 7 days. System Sound asks for nothing beyond the download.

## The numbers

| Metric | System Sound | Invoice Maker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | — |
| Size | 36 MB | 9 MB |
| Requires iOS | **15.8.3** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Nuno Lopes](https://appshunter.io/developer/1802013711) |

## What reviewers say

### System Sound

[App page](https://appshunter.io/ios/app/system-sound/id6504702118)

**Features:** macOS Compatibility

**In-app purchases:** none


### Invoice Maker

[App page](https://appshunter.io/ios/app/invoice-maker-simple/id6748588643)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $6.99 | per 7 days |
| Yearly Plan | $39.99 | per year |


## Frequently asked questions

### Is System Sound free?

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

### Is Invoice Maker free?

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

### Do System Sound or Invoice Maker have ads?

System Sound shows ads; Invoice Maker 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.*