mp4 Converter - mp4hz

Turn audio into MP4 videos on your iPhone—100% on-device. Preview every conversion in full, then upgrade to mp4hz Pro to save, share, and export your finished videos.

mp4hz — Audio to MP4 Video Converter

Turn any audio file into a polished MP4 video with animated waveform visualizations—processed entirely on your iPhone. No uploads. No cloud. Your files stay on your device.

WHY mp4hz?

Whether you are a podcaster, musician, content creator, or social media editor, mp4hz helps you transform audio into share-ready video in minutes. See exactly what you are getting before you commit—preview your full conversion result, then unlock mp4hz Pro when you are ready to save, share, and export.

TRY BEFORE YOU SUBSCRIBE

mp4hz is built on a fair try-before-you-buy model: • Import an audio file and convert it to MP4 on your device • Preview the finished video in full after conversion • Save to Photos, share, and export require an active mp4hz Pro subscription

You can evaluate quality, style, and output before subscribing. When the result looks right, Pro unlocks the actions that matter most.

100% ON-DEVICE & PRIVATE

Every conversion runs locally on your iPhone using Apple’s native media frameworks. Your audio never leaves your device. Process files offline, at your pace, with complete privacy.

STUNNING WAVEFORM VISUALIZATIONS

Choose the look that fits your content: • Classic Bars — vertical equalizer bars • Smooth Wave — flowing sine wave • Circular Pulse — radial pulse pattern • Neon Spectrum — frequency spectrum • Mirror Bars — mirrored equalizer

FLEXIBLE OUTPUT QUALITY

Pick the balance of speed and resolution that works for you: • Low — 480p (fastest) • Medium — 720p (balanced) • High — 1080p

SUPPORTED AUDIO FORMATS

Import audio from the Files app, including: MP3, M4A, WAV, AAC, FLAC, OGG, and AIFF.

SMART CONVERSION WORKFLOW

• Import audio with one tap from the home screen or Import tab • Review file details before converting • Track real-time progress and estimated time remaining • Continue using the app while a conversion runs in the background • Open past conversions from your built-in Library • Search, rename, and delete conversion history

BEAUTIFUL, FOCUSED DESIGN

• Clean, modern interface built for speed • Dark, Light, and System appearance modes • Smooth animations and intuitive controls

mp4hz PRO

Subscribe to mp4hz Pro to unlock: • Save converted videos to your Photos library • Share videos anywhere with the iOS share sheet • Unlimited conversions and full export access

Choose the plan that fits you: • Weekly subscription • Yearly subscription

Payment is charged to your Apple ID account. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in Settings > Apple ID > Subscriptions. Restore purchases anytime from Settings inside the app.

Built for creators who value privacy, quality, and control. Import your audio, pick your style, preview your video—and unlock Pro when you are ready to share it with the world.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://1kbapps.com/mp4hz/