# Volume UP/DOWN — Boost Quiet Videos & Audio

> Boost Quiet Videos & Audio (iPhone/iPad app by kazuya tsukuda.)

- Source: https://appshunter.io/ios/app/volume-updown/id6799385779 (this page in markdown: same URL + `.md`)
- Developer: [kazuya tsukuda](https://appshunter.io/developer/1841395019)
- Category: Photo & Video, Music
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 8 MB
- Languages: American English, Japanese, Chinese (Simplified, China)
- Released: 2026-08-24
- Data updated: 2026-09-11
- User reviews in markdown: https://appshunter.io/ios/app/volume-updown/id6799385779/reviews.md

## What is Volume UP/DOWN?

Make quiet voices and hard-to-hear videos easier to hear.

“Volume UP/DOWN” lets you adjust the volume of audio and video files from 0% to 300%.
It also supports AI noise reduction, helping make voices clearer in meeting recordings, lectures, interviews, travel videos, event footage, and more.

【Main Features】
・Adjust audio and video volume from 0% to 300%
・Make quiet audio louder or reduce audio that is too loud
・Reduce background noise with AI to make voices easier to hear
・Preview up to 20 seconds before conversion
・Play, share, or save processed files to Files
・Keep the original file unchanged and create a separate processed file
・Audio and video are processed on your device and are not uploaded to a server

【Useful For】
・Making quiet voices in videos easier to hear
・Improving meeting or lecture recordings
・Making interviews and recorded conversations clearer
・Adjusting the volume of family or event videos
・Lowering the volume of audio or video
・Muting audio completely

【Supported Formats】
Input:
WAV (PCM), M4A (AAC), MP3, and supported MP4 / MOV videos

Output:
Audio: M4A (AAC)
Video: MP4

※ MP4 / MOV files are supported when they contain one video track encoded in H.264 or HEVC and mono or stereo AAC-LC audio.
Some formats, including ProRes, spatial video, and videos with multiple video tracks, are not supported.

Audio and video files up to 60 seconds can be converted for free.
A one-time in-app purchase unlocks conversion of files longer than 60 seconds.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock Long File Processing | $3.99 | one-time |



## Version history (last 2 releases)

### 1.1 — 2026-09-03

Updated the App Store screenshots and listing information.

### 1.0 — 2026-08-24

No release notes.

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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 2026-09-11.*