Audio Compressor - MP3 Shrink for iPhone

App overview

MP3 Shrink — Audio Compressor is a compact iOS utility for people who want to free up space on their iPhone by shrinking audio files while keeping listening quality high. The app compresses tracks quickly, gives simple controls for bitrate and metadata removal, and can pull audio out of video clips when needed. All processing runs locally on the device, so conversions happen without sending files to remote servers.

What it can do

• Reduce file sizes using efficient compression algorithms while retaining clear sound.
• Let you remove embedded metadata (tags and artwork) to save extra space.
• Offer simple bitrate controls so you can balance quality and size.
• Extract audio streams from video files and save them as compressed audio.
• Provide a streamlined, easy-to-navigate interface for selecting and processing media.
• Perform all operations offline to keep your media private and under your control.

Typical workflow

1. Choose the audio or video file you want to optimize from your device.
2. Pick a compression preset or manually set the target bitrate and quality.
3. Optionally strip out metadata fields you don’t want to keep.
4. Start the conversion and save the resulting file back to your library or export it.

Performance and privacy

MP3 Shrink runs entirely on your iPhone, using the device’s CPU to perform encoding so your files never leave the handset. This minimizes upload time and avoids cloud storage, preserving both speed and user privacy. The app is designed to be fast and responsive, making batch processing of multiple files straightforward.