SUS4 Mix Check: Mix Analyser
LUFS, spectrum, stereo image
Free · In-App Purchases
Before the master goes to your distributor, check it against the streaming targets and a reference you trust. The audio stays on your phone.
Does your mix translate? Find out.
A mix analyser measuring LUFS, true peak, frequency balance, loudness range and stereo image.
Import from Files or capture live, then compare against a reference track you trust.
You have been in the session for four hours and you have lost perspective. SUS4 Mix Check gives you an objective read: A/B your mix against a professional reference track, check integrated LUFS against streaming platform targets, and see the frequency spectrum of both tracks overlaid so gaps and buildups are visible immediately.
The plain-English report translates the technical data into actionable language — not a raw frequency chart that requires interpretation, but a clear note that says what needs attention and where. Useful for the final check before you send a mix to a client, and useful mid-session when you need a reset.
• A/B comparison: your mix against any reference track
• Integrated LUFS measurement against streaming platform targets
• Spectrum overlay: your mix and the reference on the same display
• Plain-English report — specific, actionable, no jargon required
• Genre reference presets for common target levels
All analysis runs on-device. No audio is ever uploaded.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
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Stability and performance improvements.
The developer, ThePaulSmith, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Paul Smith
- Size
- 21.1 MB
- Category
- Music
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- SUS4 Mix Check Lifetime £59.99
- SUS4 All-Access £4.99
- SUS4 Mix Check Pro Monthly £0.99
- Copyright
- © 2026 4chords Studios