4K Video Converter: MP4 to MP3

4K Video Converter: MP4 to MP3

Convert, Compress, Resize, Fit

128 ratings
20 reviews
Free
In-App PurchasesWith Ads

Details

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

Features

4K Video Converter: MP4 to MP3 screenshot #1 for iPhone
4K Video Converter: MP4 to MP3 screenshot #2 for iPhone
4K Video Converter: MP4 to MP3 screenshot #3 for iPhone
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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 26, 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

방금 실수로 구매했습니다

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

구독해제 어디에서 해요?

실수로 했는데 어디서 끊는지를 모르겠어요 환불해주세요

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!

Worst app

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

Response from developer

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!

Didn‘t work

I paid for this App and it doesn‘t.

Response from developer

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!

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

Response from developer

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!

Developer apps

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.