FREEPROX vs SoundMaster Pro
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
FREEPROX
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Take full control of your FREEPROX portable PA system right from your iPhone or iPad. Powered by Bluetoothยฎ 5.0 Low Energy (BLE), the FREEPROX app offers complete control over your systemโs DSP and mixer functions โ all from the palm of your hand. Designed for musicians, presenters and performers of all levels, FREEPROX makes it easy to dial in your sound for any performance and fine-tune your mix on the fly. - Quickly and easily adjust master volume and channel levels - Optimize your mix with 3-band parametric EQ - Add studio-grade EFFECTS for a professional finish - Control more than one system from the same device - Set the BLUETOOTH audio STEREO LINK (TWS) between two systems - Check the BATTERY status of each system FREEPROX is 100% free: download now and bring studio-level sound control to your live performance.
SoundMaster Pro
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Sound Master โ 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 โ 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 โ 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 โ 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 โ 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
Verdict
The clearest difference is in-app purchases: FREEPROX at none against SoundMaster Pro's 1. FREEPROX also leads on ads (none vs shown). SoundMaster Pro's advantage is update cadence (every 6 days vs every 3 weeks) and device support (4 vs 2). On price and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. SoundMaster Pro sells 1 in-app purchase, starting at $11.99 per year. FREEPROX asks for nothing beyond the download.
FREEPROX ships an update every 3 weeks, SoundMaster Pro every 6 days. The most recent releases landed on September 18, 2026 and September 17, 2026 respectively.
| Parameter | FREEPROX | SoundMaster Pro |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 6 days โ better |
| Ads | No โ better | Yes |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPod | iPhone, iPad, iPod, Mac โ better |
| Requires iOS | 13.0 | 13.0 |
| Further details โ not scored | ||
| Size | 28 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | Proel | Mon Local Technique |
In-app purchases
FREEPROX
No in-app purchases
SoundMaster Pro
- Sound Master Pro โ Full Access$11.991 Year








