Comparison

SoundScope vs SUS4 Mix Check

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SoundScope

This app provides real-time audio spectrum analysis with detailed visualizations. It offers advanced features for monitoring stereo width, phase correlation, and system audio, designed for professional audio work.

Highlights
  • Real-time FFT spectrum analysis
  • Frequency bars and line graph visualizations
  • Logarithmic and linear frequency scaling
  • Stereo, Mid/Side, and Phase Correlation analysis
  • System audio loopback
  • Microphone and audio interface input
Features
Read full description

See what you hear. SoundScope turns your iPhone and iPad into a professional audio analyzer: a real-time spectrum analyzer, a broadcast-standard loudness meter and a mix assistant that tells you what to fix. All in one app. LOUDNESS, MEASURED PROPERLY • Momentary, short-term and integrated LUFS to ITU-R BS.1770 • True peak, loudness range (LRA), DR and PLR • Start, stop and reset a measurement whenever you need MIX DIAGNOSTICS • Clear alerts for clipping, true peak, streaming loudness, crushed dynamics and mono bass cancellation • Tonal balance checked against genre profiles: General, EDM, Hip-Hop, Classical, Rock, Acoustic and Podcast/Voice • See how far Spotify and YouTube will turn your track down, before you upload SPECTRUM ANALYZER • Real-time FFT from 20 Hz to 20 kHz with peak hold • Bar or line view, 20 to 120 bands, logarithmic or linear scale • FFT modes for transients, balance and mastering, with adjustable FFT size and overlap • Hold the spectrum to study a single moment FIVE FULL-SCREEN VISUALIZERS Turn your phone sideways for Spectrum Bars, Spectrum Line, Radial Bloom, Spectrogram and Ribbon Tunnel. Double-tap to switch views. STUDIO METERING • Dual VU meters with peak hold • Stereo image, phase correlation and left/right/mid/side spectra • Band RMS and mono compatibility for every band MADE TO BE USED • Eight color themes, including the per-frequency Spectrum rainbow. Swipe to change. • Built-in microphone or a connected audio interface, with adjustable sensitivity • A brushed-metal interface built for one-handed use PRIVATE BY DESIGN Everything runs on your device. No subscription, no account, no tracking and no internet connection needed. One purchase covers iPhone and iPad. Made for producers, mixing and mastering engineers, live sound engineers, musicians, podcasters and anyone who wants to see their sound.

About

SUS4 Mix Check

Features
Read full description

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/

Screenshots

SoundScope4 screens
SUS4 Mix Check4 screens

Verdict

The call

The clearest difference is update cadence: SUS4 Mix Check at fortnightly against SoundScope's monthly. SUS4 Mix Check also leads on iOS requirement (16.0 vs 26.1). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. SoundScope sells 1 one-off in-app purchase and SUS4 Mix Check sells 10 in-app purchases, starting at $4.39 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

SoundScope ships an update monthly, SUS4 Mix Check fortnightly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

Scorecard2 real differences Ā· 6 level
SoundScope versus SUS4 Mix Check: the parameters behind the verdict, then further details
ParameterSoundScopeSUS4 Mix Check
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyMonthlyFortnightly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS26.116.0 — better
Further details — not scored
Size12 MB28 MB
Age rating4+4+
DeveloperWaldemar SchneiderThePaulSmith

In-app purchases

1 purchases

SoundScope

One-time1
  • SoundScope$3.99
10 purchases

SUS4 Mix Check

Subscriptions7
  • SUS4 All-Access7 Days trial$4.391 Month
  • SUS4 All-Access7 Days trial$5.991 Month
  • SUS4 All-Access7 Days trial$7.991 Month
Show 4 more
  • SUS4 All-Access Annual7 Days trial$19.991 Year
  • SUS4 All-Access Annual7 Days trial$26.991 Year
  • SUS4 All-Access Annual7 Days trial$35.991 Year
  • SUS4 All-Access Annual7 Days trial$51.991 Year
One-time3
  • SUS4 Mix Check Lifetime$54.99
  • SUS4 Mix Check Lifetime$71.99
  • SUS4 Mix Check Lifetime$103.99

Questions

Is SoundScope free?
SoundScope is free to download, with in-app purchases available.
Is SUS4 Mix Check free?
SUS4 Mix Check is free to download, with in-app purchases available.
Do SoundScope or SUS4 Mix Check have ads?
Neither SoundScope nor SUS4 Mix Check shows ads.
Which is updated more often, SoundScope or SUS4 Mix Check?
SoundScope ships an update monthly, and SUS4 Mix Check fortnightly. Most recently, SoundScope was updated on October 31, 2026 and SUS4 Mix Check on November 5, 2026.

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