# M4S2MP4 — M4S to MP4 with audio

> M4S to MP4 with audio (iPhone/iPad app by Hushan Hushan (Shenzhen) Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/m4s2mp4/id6769826128 (this page in markdown: same URL + `.md`)
- Developer: [Hushan Hushan (Shenzhen) Technology Co., Ltd.](https://appshunter.io/developer/1896691551)
- Category: Utilities, Photo & Video
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.4 · 44 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2026-06-02
- Data updated: 2026-07-29
- User reviews in markdown: https://appshunter.io/ios/app/m4s2mp4/id6769826128/reviews.md

## What is M4S2MP4?

M4S Converter focuses on one high-intent job: fixing a video.m4s file that has no sound, or turning separated audio.m4s and video.m4s fragments into playable MP4 videos. Your video and audio files are processed on device and do not need to be uploaded.

The app scans local .m4s files, helps batch pair matching audio and video fragments, exports standard MP4 files, and makes the save location easier to understand. It is intentionally focused on M4S pairing and export instead of trying to be a universal video downloader or all-format converter.

Key features:
- Process M4S files locally without uploading user files
- Batch pair audio.m4s with video.m4s
- Fix no-sound video.m4s cases when the matching audio.m4s is available
- Convert a single M4S file when needed
- Scan local folders for M4S files
- Keep conversion records
- Save converted MP4 videos to the system gallery

Best for:
- Fixing a video.m4s file that has no sound by merging audio.m4s
- Exporting multiple separated audio.m4s and video.m4s sets as MP4 files
- Opening an M4S file that will not play normally
- Avoiding online upload for private video files

If the source folder does not contain the matching audio fragment, the exported video may still have no sound. Please make sure the related audio.m4s and video.m4s files are both available locally.

Compliance note: only process local files that you own or have permission to use.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly M4S VIP | $2.99 | per month |
| Weekly M4S VIP | $0.99 | per 7 days |
| Yearly M4S VIP | $4.99 | per year |



## Version history (last 5 releases)

### 1.7.9 — 2026-07-16

What's new:
1. Clarified on-device processing and no-upload messaging
2. Improved audio.m4s and video.m4s pairing guidance
3. Refined M4S to MP4 export and save-location experience

### 1.7.7 — 2026-06-29

What's new:
1. Clarified on-device processing and no-upload messaging
2. Improved audio.m4s and video.m4s pairing guidance
3. Refined M4S to MP4 export and save-location experience

### 1.7.6 — 2026-06-17

What's new:
1. Clarified on-device processing and no-upload messaging
2. Improved audio.m4s and video.m4s pairing guidance
3. Refined M4S to MP4 export and save-location experience

### 1.7.5 — 2026-06-09

本次更新内容：
1. 强化本地处理与不上传文件提示
2. 优化 audio.m4s 与 video.m4s 配对提示
3. 优化 M4S 转 MP4 导出与保存位置体验

### 1.7.3 — 2026-06-07

本次更新内容：
1. 强化本地处理与不上传文件提示
2. 优化 audio.m4s 与 video.m4s 配对提示
3. 优化 M4S 转 MP4 导出与保存位置体验

## More apps by Hushan Hushan (Shenzhen) Technology Co., Ltd.

- [Bole Photo Tidy](https://appshunter.io/ios/app/bole-photo-tidy/id6772713838)

All apps by Hushan Hushan (Shenzhen) Technology Co., Ltd.: https://appshunter.io/developer/1896691551

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-29.*