Comparison

CARBONcontrol vs SoundMaster Pro

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

Head to head
About

CARBONcontrol

Read full description

They will be able to adjust and customize each channel, choose the mode of use, adjust the curve with the parametric equalizer, adjust the delay and of course save all these parameters in scenes.

About

SoundMaster Pro

Features
Read full description

Sound Master β€” acoustic measurement for live-sound engineers: sound level meter, spectrum analyser, RT60, system response and speaker delay alignment. Usable results in seconds, in the field, offline and with no account. Built for the field Sound techs, system engineers, installers: every tool answers a real situation β€” finding a hole in the response before the audience arrives, checking an RT60, aligning a delay tower, tuning a system. Mic-based readings are indicative, not calibrated: a field tool, not a lab. On iPhone and iPad Real-time sound level meter in decibels. Real-time spectrum analyser, full-resolution FFT or octave bands from 1/1 to 1/12, with peak hold and RMS curve. RT60 measurement (T20 method). Signal generator (sine, white noise, pink noise, log sweep). Swept system response. Speaker delay alignment. Saved captures that can be compared against each other and exported to PDF. On Mac β€” additionally A Mac has an audio interface plugged into it, and the Mac edition uses it. Live mode: meter, analyser and spectrogram side by side in one window, each panel resizable and adjustable on its own. dB A and dB C over fifteen minutes, microphone calibration, limits that turn red when exceeded, a trend indicator. Session recording to PDF minute by minute, and instant screen capture to PDF. Input routing: each bus is assigned to any input of any device, from inside the app. The MIC bus carries the measurement β€” it is what the meter, the analyser and the spectrogram all read. The optional REF bus carries the reference signal and appears as an extra curve on the analyser with its own scale, draggable so it can be laid over the measurement for comparison. The two buses can come from two different boxes: the app builds its own private aggregate device with clock drift correction, adding nothing to your system settings and never touching Audio MIDI Setup. Subscription Free trial, then subscription. The subscription is shared across iPhone, iPad and Mac β€” one purchase covers all your devices. On Mac there is no ad-supported free tier. About level readings The meter gives working figures for the sound engineer, dependent on your microphone's calibration. It is not a regulatory sound level meter: a legally valid measurement requires a class 1 or 2 instrument per IEC 61672. In a venue subject to noise regulation, the venue's own system is what counts. Terms Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://soundmaster.monlocaltechnique.fr/privacy.html

Screenshots

CARBONcontrol4 screens
SoundMaster Pro4 screens

Verdict

The call

The clearest difference is in-app purchases: CARBONcontrol at none against SoundMaster Pro's 1. CARBONcontrol also leads on ads (none vs shown). SoundMaster Pro's advantage is update cadence (every 6 days vs every 2 months) and device support (4 vs 2). On price and iOS requirement there is nothing between them.

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

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

Both are free to download. SoundMaster Pro sells 1 in-app purchase, starting at $11.99 per year. CARBONcontrol asks for nothing beyond the download.

UpkeepUpdate frequency

CARBONcontrol ships an update every 2 months, SoundMaster Pro every 6 days. The most recent releases landed on September 9, 2026 and September 17, 2026 respectively.

Scorecard4 real differences Β· 2 level
CARBONcontrol versus SoundMaster Pro: the parameters behind the verdict, then further details
ParameterCARBONcontrolSoundMaster Pro
PriceFreeFree
Update frequencyEvery 2 monthsEvery 6 days β€” better
AdsNo β€” betterYes
In-app purchasesNo β€” betterYes
DevicesiPhone, iPodiPhone, iPad, iPod, Mac β€” better
Requires iOS12.0 β€” better13.0
Further details β€” not scored
Size45 MB47 MB
Age rating12+4+
DeveloperHIT MusicMon Local Technique

In-app purchases

None

CARBONcontrol

No in-app purchases

1 purchases

SoundMaster Pro

Subscriptions1
  • Sound Master Pro β€” Full Access$11.991 Year

Questions

Is CARBONcontrol free?
CARBONcontrol is free to download, with no in-app purchases.
Is SoundMaster Pro free?
SoundMaster Pro is free to download, with in-app purchases available.
Do CARBONcontrol or SoundMaster Pro have ads?
SoundMaster Pro shows ads; CARBONcontrol does not.
Which is updated more often, CARBONcontrol or SoundMaster Pro?
CARBONcontrol ships an update every 2 months, and SoundMaster Pro every 6 days. Most recently, CARBONcontrol was updated on September 9, 2026 and SoundMaster Pro on September 17, 2026.

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