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4K Video Converter: MP4 to MP3

4K Video Converter: MP4 to MP3

Convert, Compress, Resize, Fit

128 ratings
15 reviews
With Ads
🔧 Utilities
📷 Photo & Video
Free
In-App PurchasesWith Ads

Details

  • Released
  • Updated
  • May 12, 2024
  • July 27, 2026

Features

Developer

Viacheslav Khakhulin
✨Promote your app ✨
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iphone
ipad
🧾$19.99
In-App Purchase↘︎
⭐15
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📝10+ tags
Tags↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
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📦~ in 1 week
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About

This app allows you to quickly compress, resize, or convert videos to various formats, including audio. All processing happens directly on your device, ensuring privacy and speed. Easily save, share, or open your converted files in other applications.

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

What's New in 4K Video Converter

1.5.3

July 27, 2026

- New languages

Subscription plans

Monthly

Unlimited access to all features

$2.991 Month
Price Updates
August 4, 2026→$2.99
June 9, 2026→$3.99
October 20, 2025→$2.99
May 4, 2025→$1.99
April 15, 2025→$3.99
March 25, 2025→$0.99
March 18, 2025→$2.99
December 23, 2024→$1.99
December 17, 2024→$2.99
December 5, 2024→$3.99
November 6, 2024→$2.99
October 10, 2024→$2.99
How to cancel 4K Video Converter subscription ⁉️
8

In-App Purchases

$19.99

Premium

Unlimited access to all features

User reviews

Most RecentHighest RatedLowest Rated

방금 실수로 구매했습니다

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

구독해제 어디에서 해요?

실수로 했는데 어디서 끊는지를 모르겠어요 환불해주세요
초코렛a초코렛a

Response from developer

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!

Tricked into buying this

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

Terrible

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.
Show more
PiygyiteturdhkgchkgcPiygyiteturdhkgchkgc

Response from developer

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.

Horrible

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
SouthemalynnSouthemalynn

Response from developer

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.

See 10 more reviews

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FAQ

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.