RMS Calculator vs Live Audio Multi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RMS Calculator
Read full descriptionHide 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.
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.
- 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
Read full descriptionHide 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
Verdict
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
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.
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.
| Parameter | RMS Calculator | Live Audio Multi |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | — | 5.0 (5 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 5 — better |
| Update frequency | Every 15 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 8 MB | 2 MB |
| Age rating | +4 | 4+ |
| Developer | Kei Suefuji | Bryan Hargrave |
In-app purchases
RMS Calculator
No in-app purchases
Live Audio Multi
No in-app purchases
Questions
Is RMS Calculator free?
Is Live Audio Multi free?
Do RMS Calculator or Live Audio Multi have ads?
Which is updated more often, RMS Calculator or Live Audio Multi?
Other comparisons















