# 4K Video Converter: MP4 to MP3 — Convert, Compress, Resize, Fit

> On-device video converter, compressor, and resizer for multiple formats. (iPhone/iPad app by Viacheslav Khakhulin.)

- Source: https://appshunter.io/ios/app/4k-video-converter-mp4-to-mp3/id6502281346 (this page in markdown: same URL + `.md`)
- Developer: [Viacheslav Khakhulin](https://appshunter.io/developer/558806761)
- Category: Photo & Video, Utilities
- Price: Free with in-app purchases
- Rating: 4.50/5 from 128 App Store ratings · 20 written reviews indexed
- Age rating: 17+
- Requires: iOS 16.0 · 44 MB
- Languages: American English, French (France), German (Germany), Greek, Hindi, Indonesian, Italian, Korean, Brazilian Portuguese, Russian and 4 more
- Released: 2024-05-12
- Data updated: 2026-09-08
- Monetization: subscription
- User reviews in markdown: https://appshunter.io/ios/app/4k-video-converter-mp4-to-mp3/id6502281346/reviews.md

## What is 4K Video Converter?

Quickly compress, resize or convert your videos to nearly any video or audio format!
All processing is done on device, no need send your media anywhere like in most other apps!

1. Select your input files.
2. Choose task to finish: Compress, Resize or Convert.
3. Choose your output format if needed ( MP4, MP3, MOV, M4V etc. ).
4. Process! It will only take a few seconds!
5. Save your file, or open it in your favourite app!

Save, Share or View your converted videos in your favourite apps immediately.

After conversion, you can immediately AirDrop your files right to your Mac or another device.

Conversions usually take less than 15 seconds!

The app requires subscription to enjoy unlimited access to all features!
-By subscribing you get unlimited access to all the app’s functionality for the whole duration of your subscription period.
-Payment will be charged to iTunes Account at confirmation of purchase.
-Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period.
-Account will be charged for renewal within 24-hours prior to the end of the current period.
-You can manage your subscription and turn off the auto-renewal anytime through your Account Settings.

Privacy Policy: https://mobile-apps.dev/video-converter-privacy-policy
Terms of Use: https://mobile-apps.dev/video-converter-terms-of-use

## Key features

- Compress videos
- Resize videos
- Convert video to audio
- Supports MP4, MP3, MOV, M4V
- On-device processing
- Fast conversion (under 15 seconds)

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Monthly | $3.99 | per month |
| Yearly | $11.99 | per year |
| Weekly | $1.99 | per 7 days |
| Quarterly | $7.99 | per 3 months |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Premium | $19.99 | one-time |


## Recent user reviews (10 of 20)

All indexed reviews: https://appshunter.io/ios/app/4k-video-converter-mp4-to-mp3/id6502281346/reviews.md

### 5/5 — 방금 실수로 구매했습니다

*2026-07-19*

방금 전에 실수로 구매해서 결제했는데 환불 부탁드립니다ㅠㅠ 구독취소는 눌렀는데 방금 결제한 금액이 환불은 되나요? 앱내에서 프로그램은 아무것도 사용하지 않았습니다

### 5/5 — 구독해제 어디에서 해요?

*2026-06-10*

실수로 했는데 어디서 끊는지를 모르겠어요 환불해주세요

**Developer response:** 안녕하세요, 리뷰 남겨주셔서 감사합니다! 불편을 드려서 정말 죄송합니다. 구독 취소는 iPhone의 설정 앱 → [본인 이름] → 구독에서 직접 하실 수 있습니다. 환불은 Apple을 통해 처리되며, reportaproblem.apple.com에서 요청하실 수 있습니다. 추가 도움이 필요하시면 support@mobile-apps.dev로 연락 주세요. 감사합니다!

### 1/5 — Worst app

*2026-06-06*

Waste of money, doesn’t provide anything , don’t waste your money people!!!!

**Developer response:** Hi, thank you for your feedback. We're sorry to hear you're unhappy with the app — that's not the experience we want for our users. We'd love to understand what went wrong and help you out. Please reach out to us at support@mobile-apps.dev and we'll do our best to resolve the issue or assist with a refund. We appreciate you taking the time to share your thoughts!

### 1/5 — Didn‘t work

*2026-05-24*

I paid for this App and it doesn‘t.

**Developer response:** Hi Tina, thank you for your feedback. We're sorry to hear the app isn't working for you — please reach out to us at support@mobile-apps.dev and we'll help you get it sorted. We want to make sure you get the experience you paid for!

### 1/5 — Tricked into buying this

*2026-05-04*

It comes up when I search for video downloader (youtube etc.). It’s just an editor.
Well done for stealing £3 from me

**Developer response:** Hi, thank you for your feedback. We're sorry to hear you felt misled — that's never our intention. Our app, 4K Video Converter, is a video editing and conversion tool, not a downloader. We understand how frustrating it can be to purchase something that doesn't meet your needs. Please contact us at support email and we'll do our best to help you get a refund. We appreciate your honesty!

### 1/5 — Terrible

*2026-03-10*

This is a cleverly crafted app devised to fool the consumer into thinking they are getting something they are not getting. This is NOT 4K Downloader. I didn’t want a subscription to this app and was charged. Tried to cancel and the message I received was “will be cancelled 3/10/27. I want a refund to my apple account.

**Developer response:** We’re really sorry to hear about your experience.
Please note that our app is a separate product and is not affiliated with 4K Downloader. We understand how this may have caused confusion, and we appreciate you pointing it out.
Regarding the subscription, all purchases are handled by Apple. You can manage or cancel your subscription anytime through your Apple ID settings. If you believe you were charged by mistake, we recommend requesting a refund directly from Apple via reportaproblem.apple.com, as only Apple can process refunds.
If you need any assistance or have further questions, feel free to contact our support team — we’re here to help.

### 1/5 — Horrible

*2026-01-30*

When I tried to use it it tried to make me pay to use it! Will not be using again do not download this app

**Developer response:** We’re sorry this was frustrating. The app offers optional paid features, but you can cancel/avoid any subscription prompts. If you share where you saw the payment screen, we’ll help and improve the experience.

### 3/5 — It doesn’t handle big files

*2026-01-12*

I tried to convert 4K 1.6GB file to HD. After 5 minute the program still try to opened it. 300MB files it handles OK.

**Developer response:** Thanks a lot for review!
We will test and fix it as soon as possible!

### 1/5 — Won’t download

*2025-11-08*

Terrible product not user friendly, waste of money

### 1/5 — Scam

*2025-10-21*

I was led to purchase this as a video downloader.  That is what the copy I read said.
It does not, but you don’t really find that out until after you pay for it .

Hucksters!!!!

**Developer response:** We’re sorry to hear about your experience and appreciate you sharing your concerns. Our intention has never been to mislead users. The app is designed specifically for video and audio conversion, not for downloading videos, and this functionality is described in the App Store listing. That said, we understand how frustrating it can be if expectations don’t match the actual features, especially after a purchase. Your feedback highlights the need for clearer communication, and we’re taking it seriously to improve how we present the app.

## Frequently asked questions about 4K Video Converter

### What does this video converter app do?

This app allows you to compress, resize, or convert your video files into almost any video or audio format. It handles all processing directly on your device, so your media is never sent to external servers. You can then save, share, or open your converted files in other applications.

### What are the key features of this app?

Key features include the ability to compress videos, resize them to different dimensions, and convert them to various formats like MP4, MP3, MOV, and M4V. All conversions are performed on-device, ensuring privacy and speed, often taking less than 15 seconds.

### How much does the 4K Video Converter app cost?

The app requires a subscription to access all features and enjoy unlimited use. Payment is charged to your iTunes Account upon purchase confirmation. You can manage your subscription and turn off auto-renewal at any time through your Account Settings.

### What devices is this app compatible with?

While specific device compatibility isn't detailed, the app is designed for mobile devices and mentions features like AirDropping files to a Mac or another device, suggesting compatibility with iOS and potentially macOS ecosystems.

### What are common use cases for this app?

Common use cases include reducing the file size of videos for easier sharing or storage, changing video dimensions for specific platforms, or extracting audio from video files to create MP3s. The on-device processing is ideal for users concerned about privacy.

## Version history (last 5 releases)

### 1.5.3 — 2026-07-27

- New languages

### 1.5.2 — 2026-02-11

- Changes in monetisation

### 1.5.1 — 2026-01-08

- Reduced ad frequency
- Expanded limits for free users

### 1.5.0 — 2025-12-18

- UI fix
- Ads fix

### 1.4.9 — 2025-12-15

- App launch bug fixes

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All apps by Viacheslav Khakhulin: https://appshunter.io/developer/558806761

## Related topics

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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 2026-09-08.*