Comparison

RMS Calculator vs Live Audio Multi

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

Head to head
About

RMS Calculator

Features
Read full description

How should the effective value be calculated? What is the amplitude of the effective value of 100V? In such a case, do you have any experience of calculating the effective value while checking the calculation formula every time? This app can quickly convert the effective value and amplitude of AC waveforms. There are 4 types of conversion units: rms value, average value, amplitude, and Peak to Peak Amplitude. By inputting the amplitude or effective value of the AC waveform and selecting the unit of the input value, the value converted into 4 types of units will be displayed.

About

Live Audio Multi

This offline utility app provides live sound engineers and musicians with essential tools like an RTA, SPL meter, delay calculator, and signal generator. It offers advanced features for system setup and analysis, all within a clean, ad-free interface.

Highlights
  • Fractional-octave RTA with live peak readout
  • SPL meter with dB(A), dB(C), dB(Z) and Leq
  • Delay calculator with temperature/humidity compensation
  • Sub-array design for broadside and end-fire arrays
  • Signal generator with sine sweep and noise
  • Unit converters for temperature, distance, and pressure
Features
Read full description

Live Audio Multi-Tool (LAM-T) is a fast, offline toolbox for live sound engineers, system techs, AV installers, and musicians. Everything you reach for at a gig — an analyzer, an SPL meter, a delay calculator, sub-array alignment, a signal generator — in one clean app. No account, no ads, no tracking. REAL-TIME ANALYZER (RTA) • Fractional-octave RTA with a live peak readout • A / C / Z weighting • Spectrogram view, freeze, peak hold, and capture/compare • Adjustable Y-offset for quick reference matching • Spectrogram sensitivity control to bring out quiet detail SPL METER + Leq • dB(A), dB(C), dB(Z) with peak hold • Running Leq over 1, 15, or 60 minutes • Per-device calibration offset — match it to a real meter once and it sticks DELAY CALCULATOR • Speed-of-sound delay from real temperature and humidity (auto-filled from your location) • Feet or metres SUB-ARRAY DESIGNER • Broadside and end-fire arrays • Cardioid tops (castellated or all-subs) • Per-sub delay times computed for your spacing and coverage SIGNAL GENERATOR • Sine (20 Hz–20 kHz, log sweep), pink noise, and a polarity-check pulse • Polarity reader — check a speaker's polarity through the mic UNIT CONVERTERS • Temperature, distance, and pressure • Reads your device's barometer for true local air pressure Built for the real world: it works offline, launches instantly, and stays out of your way. Informational only, no warranty. Measurements and conversions are estimates — verify anything critical with calibrated instruments.

Screenshots

RMS Calculator2 screens
Live Audio Multi4 screens

Verdict

The call

The clearest difference is price: Live Audio Multi at Free against RMS Calculator's $1.99. Live Audio Multi also leads on update cadence (every 3 weeks vs every 15 months). RMS Calculator's advantage is iOS requirement (12.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Live Audio Multi is free to download; RMS Calculator costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

RMS Calculator ships an update every 15 months, Live Audio Multi every 3 weeks. The most recent releases landed on October 27, 2026 and October 29, 2026 respectively.

Scorecard3 real differences · 7 level
RMS Calculator versus Live Audio Multi: the parameters behind the verdict, then further details
ParameterRMS CalculatorLive Audio Multi
Price$1.99Free — better
Rating—5.0 (5 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—5 — better
Update frequencyEvery 15 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size8 MB2 MB
Age rating+44+
DeveloperKei SuefujiBryan Hargrave

In-app purchases

None

RMS Calculator

No in-app purchases

None

Live Audio Multi

No in-app purchases

Questions

Is RMS Calculator free?
RMS Calculator costs $1.99, with no in-app purchases.
Is Live Audio Multi free?
Live Audio Multi is free to download, with no in-app purchases.
Do RMS Calculator or Live Audio Multi have ads?
Neither RMS Calculator nor Live Audio Multi shows ads.
Which is updated more often, RMS Calculator or Live Audio Multi?
RMS Calculator ships an update every 15 months, and Live Audio Multi every 3 weeks. Most recently, RMS Calculator was updated on October 27, 2026 and Live Audio Multi on October 29, 2026.

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