Audio Compressor vs UnderMB
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Audio Compressor
Easily reduce the size of audio files like MP3, M4A, AAC, and WAV without sacrificing quality. This app offers batch processing, preview options, and various compression settings to save space and share audio faster.
- Compress multiple audio files
- Preview before and after compression
- Adjust compression level and bitrate
- Apply fade in/out effects
- Mono/Stereo conversion
- Volume normalization
- Batch processing
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Say goodbye to large audio files and wasted space. Audio Compressor & MP3 Reducer makes it easy to compress MP3, M4A, AAC, and WAV files while preserving audio quality. What's New: - Audio frequency control for perfect compatibility - Mono/Stereo conversion to reduce file size - Volume normalization for consistent sound levels - Smooth fade in/out effects for a professional finish - Smart quality settings and flexible bitrate options - Batch processing with real-time progress tracking Key Features: - Compress multiple audio files at once - Preview before and after compression - Choose compression level and bit rate (128, 256, 384, 512 kbps) - Instantly view size savings before you save - Easy one-tap operation and simple interface - Save compressed audio in seconds How to Use: 1. Select your audio files (MP3, M4A, AAC, WAV) 2. Set your preferred compression and quality settings 3. Apply effects like fade, normalization, or mono/stereo conversion 4. Preview results 5. Save or share your compressed files Perfect for musicians, podcasters, students, and anyone who wants to save device space or share audio quickly. Your feedback is always welcome at sumansharmadeveloper@gmail.com. Update to the latest version of Audio Compressor now and experience smarter, easier audio compression!
UnderMB
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UnderMB helps you reduce photo, video, audio, and PDF file sizes to fit common upload limits. Processing happens on your device. WHAT IT DOES • Choose a target size: 500 KB, 1 MB, 2 MB, 5 MB, or a custom value • Compress images, videos, audio files, and PDFs • Preview results before saving or sharing • Built-in presets for email, visa forms, WhatsApp, and similar uploads • Optional metadata removal (EXIF/GPS, PDF info) • Batch queue for multiple files • Save to Files or share from the app PRIVACY UnderMB does not require an account. Files are processed locally and are not uploaded to UnderMB servers. GOOD FOR • Forms and portals with file size limits • Smaller email attachments • Chat apps with upload caps • Reducing file size before sharing
Screenshots
Verdict
The clearest difference is rating: UnderMB at 5.0 against Audio Compressor's 3.0. On price, ratings volume, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
UnderMB holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
Audio Compressor ships an update weekly, UnderMB every 11 days. The most recent releases landed on October 26, 2026 and October 29, 2026 respectively.
| Parameter | Audio Compressor | UnderMB |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 — better | 1 |
| Update frequency | Weekly — better | Every 11 days |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 55 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Suman Sharma | CEMRE SIMSEK |
In-app purchases
Audio Compressor
No in-app purchases
UnderMB
No in-app purchases
Questions
Is Audio Compressor free?
Is UnderMB free?
Which has better reviews, Audio Compressor or UnderMB?
Do Audio Compressor or UnderMB have ads?
Which is updated more often, Audio Compressor or UnderMB?
Other comparisons
