# FixM4A vs Air Receiver Tank Sizing

The clearest difference is price: FixM4A at Free against Air Receiver Tank Sizing's $4.99. FixM4A also leads on update cadence (every 4 days vs every 3 months) and iOS requirement (15.0 vs 17.0). Air Receiver Tank Sizing's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

FixM4A is free to download; Air Receiver Tank Sizing costs $4.99 up front. FixM4A sells 1 one-off in-app purchase. Air Receiver Tank Sizing asks for nothing beyond the download.

FixM4A ships an update every 4 days, Air Receiver Tank Sizing every 3 months. The most recent releases landed on October 19, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | FixM4A | Air Receiver Tank Sizing |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Newkline Co., Ltd.](https://appshunter.io/developer/581922117) | [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858) |

## What reviewers say

### FixM4A

[App page](https://appshunter.io/ios/app/fixm4a/id6743666599)

This utility tool aims to recover unplayable M4A audio files corrupted by truncation or damage. It extracts and converts available data from damaged files to restore them. Users select the corrupted file and a similar good file to initiate the repair process.

**Highlights:** Repair truncated M4A files, Recover corrupted audio, Extract data from damaged files, Convert restored audio, User-friendly repair process

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fix M4A | $3.99 | one-time |


### Air Receiver Tank Sizing

[App page](https://appshunter.io/ios/app/air-receiver-tank-sizing/id6761745062)

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

**In-app purchases:** none


## Frequently asked questions

### Is FixM4A free?

FixM4A is free to download, with in-app purchases available.

### Is Air Receiver Tank Sizing free?

Air Receiver Tank Sizing costs $4.99, with no in-app purchases.

### Do FixM4A or Air Receiver Tank Sizing have ads?

Neither FixM4A nor Air Receiver Tank Sizing shows ads.

### Which is updated more often, FixM4A or Air Receiver Tank Sizing?

FixM4A ships an update every 4 days, and Air Receiver Tank Sizing every 3 months. Most recently, FixM4A was updated on October 19, 2026 and Air Receiver Tank Sizing on October 31, 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.*