# SUS4 Mix Check: Mix Analyzer — LUFS, true peak, reference

> LUFS, true peak, reference (iPhone/iPad app by ThePaulSmith.)

- Source: https://appshunter.io/ios/app/sus4-mix-check-mix-analyzer/id6777229916 (this page in markdown: same URL + `.md`)
- Developer: [ThePaulSmith](https://appshunter.io/developer/319584506)
- Category: Music, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 27 MB
- Languages: American English, Arabic, Bangla, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France) and 34 more
- Released: 2026-06-16
- Data updated: 2026-10-25

## What is SUS4 Mix Check?

See whether your mix is too loud for streaming before you send it.
Measure LUFS, true peak and loudness range, compare the numbers with a reference track, and get a plain-English report.
Fully on-device: no cloud, no account.

Import a file or capture live input. Mix Check grades it against a streaming service's loudness target and a genre profile, then lists what is off: 2.2 LU too loud, true peak within the ceiling, the low end 1.2 dB darker than the reference.

• Integrated, short-term and momentary LUFS (BS.1770-4), true peak and loudness range
• Targets for the main streaming services and EBU R128
• Your mix next to a reference: loudness, dynamics, stereo correlation and frequency balance
• A plain-English report of what to change
• Session history: pin two versions of your mix and overlay their spectrum

For home-studio producers, mixing engineers and bands who master their releases at home. Mix Check measures; it does not play audio back.

Pro, or SUS4 All-Access across the whole range, removes the daily limit on analyses.

Made in the UK by working musicians.

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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| SUS4 Mix Check Pro Monthly | $0.99 | per month |
| SUS4 All-Access | $4.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| SUS4 Mix Check Lifetime | $59.99 | one-time |


## Is SUS4 Mix Check safe?

Not enough ratings yet to assess SUS4 Mix Check.

## Is SUS4 Mix Check legit?

SUS4 Mix Check: Mix Analyzer appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for SUS4 Mix Check is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.2.0 — 2026-10-12

SUS4 now speaks your language: the app is available in 50 languages.
Any lifetime purchase now unlocks every SUS4 app.
A clearer upgrade screen, plus fixes and polish throughout.

### 1.1.3 — 2026-09-28

Stability and performance improvements.

### 1.1.2 — 2026-09-14

Lifetime purchase option and reliability improvements.

### 1.1.1 — 2026-08-27

Lifetime purchase option and reliability improvements.

### 1.1.0 — 2026-07-02

Every advertised feature is now fully functional, Pro genuinely unlocks real features, and the new SUS4 All-Access pass unlocks all 24 SUS4 apps with a 7-day free trial. Faster and clearer throughout.

## Apps similar to SUS4 Mix Check

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Nerve DJs](https://appshunter.io/ios/app/nerve-djs/id1053790937) | 4.9 (96) | Free | Music |
| [capfuse: Mashup & Remix Maker](https://appshunter.io/ios/app/capfuse-mashup-and-remix-maker/id6745314888) | 5.0 (2) | Free | Music |
| [iAudio-AI Engineer](https://appshunter.io/ios/app/iaudio-ai-engineer/id6760255595) | 5.0 (10) | Free | Music |
| [MixMarker](https://appshunter.io/ios/app/mixmarker/id6758562661) | — | Free | Music |
| [247 Mixing](https://appshunter.io/ios/app/247-mixing/id6449045290) | 3.4 (18) | Free | Music |
| [DJ Mixer Studio](https://appshunter.io/ios/app/dj-mixer-studio/id6791925629) | 5.0 (3) | Free | Music |

## More apps by ThePaulSmith

- [iScrobble Pick And Mix](https://appshunter.io/ios/app/iscrobble-pick-and-mix/id319584503)
- [iSwipeMusic](https://appshunter.io/ios/app/iswipemusic/id334689181)
- [iShuffleAlbums](https://appshunter.io/ios/app/ishufflealbums/id335009718)
- [iBreathalyzer](https://appshunter.io/ios/app/ibreathalyzer/id369686249)
- [SUS4 Pitch Pipe: Starting Note](https://appshunter.io/ios/app/sus4-pitch-pipe-starting-note/id6777229584)
- [SUS4 Chord ID: Chord Finder](https://appshunter.io/ios/app/sus4-chord-id-chord-finder/id6777229621)

All apps by ThePaulSmith: https://appshunter.io/developer/319584506

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-25.*