# addSound vs MCMaintenanceBook

The clearest difference is in-app purchases: addSound at none against MCMaintenanceBook's 1. addSound also leads on ads (none vs shown) and update cadence (every 2 months vs every 10 months). On price and device support there is nothing between them.

Both are free to download. MCMaintenanceBook sells 1 one-off in-app purchase. addSound asks for nothing beyond the download.

addSound ships an update every 2 months, MCMaintenanceBook every 10 months. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | addSound | MCMaintenanceBook |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 10 months |
| Monetization | Free | — |
| Size | 75 MB | 7 MB |
| Requires iOS | **12.2** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aogochi Inc.](https://appshunter.io/developer/1528156418) | [Tooru Inoue](https://appshunter.io/developer/1712590463) |

## What reviewers say

### addSound

[App page](https://appshunter.io/ios/app/addsound/id1528156416)

Customize your audio experience with adjustable volume, tap sensitivity, and sound effects. Manage device power and update firmware. Access FAQs for support.

**Highlights:** Automatic volume adjustment, Tap sensitivity settings, Automatic power-off, Sound expansion and clarity, Firmware updates, FAQ access

**In-app purchases:** none


### MCMaintenanceBook

[App page](https://appshunter.io/ios/app/mcmaintenancebook/id6469745889)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add managed vehicles | $2.99 | one-time |


## Frequently asked questions

### Is addSound free?

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

### Is MCMaintenanceBook free?

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

### Do addSound or MCMaintenanceBook have ads?

MCMaintenanceBook shows ads; addSound does not.

### Which is updated more often, addSound or MCMaintenanceBook?

addSound ships an update every 2 months, and MCMaintenanceBook every 10 months. Most recently, addSound was updated on November 3, 2026 and MCMaintenanceBook on November 8, 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.*