# Otoadd Control vs Safe In Sound

The clearest difference is in-app purchases: Otoadd Control at none against Safe In Sound's 3. Otoadd Control also leads on update cadence (every 3 weeks vs every 6 weeks) and iOS requirement (15.1 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Safe In Sound sells 3 in-app purchases, starting at $2.99 per month. Otoadd Control asks for nothing beyond the download.

Otoadd Control ships an update every 3 weeks, Safe In Sound every 6 weeks. The most recent releases landed on September 19, 2026 and July 2, 2026 respectively.

## The numbers

| Metric | Otoadd Control | Safe In Sound |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Size | 42 MB | 35 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RelaJet Tech (Taiwan) Co., Ltd.](https://appshunter.io/developer/1492983723) | [Shane Spillman](https://appshunter.io/developer/1847909235) |

## What reviewers say

### Otoadd Control

[App page](https://appshunter.io/ios/app/otoadd-control/id6714463154)

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

**In-app purchases:** none


### Safe In Sound

[App page](https://appshunter.io/ios/app/safe-in-sound/id6754333955)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Safe In Sound Monthly | $2.99 | per month |
| Safe In Sound Yearly | $12.99 | per year |
| Safe In Sound Lifetime | $24.99 | one-time |


## Frequently asked questions

### Is Otoadd Control free?

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

### Is Safe In Sound free?

Safe In Sound is free to download, with in-app purchases available.

### Do Otoadd Control or Safe In Sound have ads?

Neither Otoadd Control nor Safe In Sound shows ads.

### Which is updated more often, Otoadd Control or Safe In Sound?

Otoadd Control ships an update every 3 weeks, and Safe In Sound every 6 weeks. Most recently, Otoadd Control was updated on September 19, 2026 and Safe In Sound on July 2, 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.*