Comparison

RTA vs Plus Audio MPS

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

Head to head
About

RTA

Analyze audio frequencies, test speakers, and tune rooms with this professional-grade acoustical analysis tool. It offers octave and 1/3 octave modes, peak hold, and averaging, with automatic microphone compensation for accurate results.

Highlights
  • Real-time acoustical analysis
  • Octave and 1/3 Octave modes
  • Peak Hold and Average modes
  • Automatic microphone compensation
  • Save, recall, and export graphs
  • Interactive touch GUI
  • Noise curve overlays
Features
Currently charting
Read full description

A Real Time Analyzer for the iPhone, iPad and iPod Touch. Test your speakers, tune your room, do acoustical analysis work or just have a better understanding of audio frequencies. RTA is a professional-grade acoustical analysis tool. All filters meet or exceed ANSI and IEC Class 1 specifications. Includes Octave and 1/3 Octave modes, with selectable decay times, as well as Peak Hold and true linear Average mode. *** iOS Microphones We have analyzied every iOS device, including all of the iPads, all iPhones, and iPod touches, and have created microphone compensation files that are applied automatically. You can trust the results you are getting, often within just a few dB of a far more expensive analyzer. Calibration is updated regularly, automatically, from our cloud-based calibration database. Upgrade to our iTestMic or iAudioInterface2 to bring your system up to full professional specs. *** Save and Recall Graphs You can save and recall graphs, marked with the GPS location, date & time, and your comment, as well as store the image to your photo roll. Export the data as an XLS formatted file to your computer for inclusion in reports or further analysis. *** Max and Min Bars You can also turn on resettable Max/Min bars (see image #4) to capture peaks. Double-tap to reset the bars. *** Specifications and Devices The internal iPhone mic has a noise floor near 30 dB, and if your are running iOS 6, clips around 120 dB. *** Touch GUI Fully interactive touch GUI features includes scroll up/down, pinch to zoom or compress the vertical dB scale, or swipe horizontally to get a cursor that reads out the exact dB level and frequency across the screen. To make the cursor disappear, swipe it off the graph to the left. The landscape-mode display flips 180 degrees so that you can face the internal mic in either direction. *** Overlay Curves Also included are optional noise curve overlays, in NCB, RC, PNC, NC, X-Curve and NR mode. See picture #2 for an example. Use this feature to get a quick reading on the noise levels in a room. Also includes the cinema large-room X-curve overlay. *** Calibration RTA can be fully calibrated, whether you are using it with the internal iOS microphone, or one of our professional test & measurement mic solutions. And, if you are using iTestMic, the mic calibration is transmitted directly to the app, so you are always calibrated. *** RTA or FFT? If you are wondering if you should download this app or our FFT app, check out our website, we have a page devoted to this topic. See our other acoustics and audio apps, including AudioTools.

About

Plus Audio MPS

Features
Read full description

Full Control. Wireless Freedom. Precision Sound. The Plus Audio MPS App gives you intuitive control over your MPS12A and MPS15A and MPS18BA active loudspeakers—right from your iPhone or iPad. Whether you're a sound engineer, DJ, or performer, the app empowers you to fine-tune your system in real time via Bluetooth. Adjust EQ, tweak gain, apply delay, and switch between custom presets with ease—all from the palm of your hand. Key Features: Wireless Bluetooth control of MPS12A and MPS15A speakers 4-band EQ for detailed tone shaping Preset selection for different sound environments Gain, delay, and crossover adjustments Save and recall user-defined settings Quick and easy connection interface Designed for convenience without compromising control, the Plus Audio MPS App helps you sound your best—no matter the venue. Experience smart sound. Download the Plus Audio MPS App today.

Screenshots

RTA4 screens
Plus Audio MPS4 screens

Verdict

The call

The clearest difference is price: Plus Audio MPS at Free against RTA's $4.99. Plus Audio MPS also leads on in-app purchases (none vs 2) and update cadence (fortnightly vs every 3 months). RTA's advantage is chart position (#168 vs unranked). On ads 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

Plus Audio MPS is free to download; RTA costs $4.99 up front. RTA sells 2 one-off in-app purchases. Plus Audio MPS asks for nothing beyond the download.

UpkeepUpdate frequency

RTA ships an update every 3 months, Plus Audio MPS fortnightly. The most recent releases landed on September 24, 2026 and September 8, 2026 respectively.

Scorecard5 real differences · 6 level
RTA versus Plus Audio MPS: the parameters behind the verdict, then further details
ParameterRTAPlus Audio MPS
Price$4.99Free — better
Rating3.9 (26 ratings) — better—
Positive reviews60.7% of reviews—
Number of ratings26 — better—
Update frequencyEvery 3 monthsFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank#168 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.012 — better
Further details — not scored
Size29 MB43 MB
Age rating4+17+
DeveloperAndrew SmithStage Audio Works (PTY) Ltd

Bugs and requests

RTA

Reported bugs

18 issues
  • App crashes after iOS updates (iOS 13, 15, 16, 17, 18)
  • App freezes or crashes on startup
  • App only displays half the screen
  • App does not save analysis readings to photo roll
  • App stops working on older iPads after updates
Show 13 more
  • Accessory found/removed loop with iTestMic 2
  • App continues to run in background, draining battery
  • Calibration not supported for specific iPad models
  • App not installing after purchase/update
  • App not opening on iPhone 4 after update
  • dB/input level is useless after update
  • Screen not expanding after updates
  • App not compatible with iOS 7
  • App crashes when saving screen
  • App not working with iMM-6 microphone
  • App overcompensates for low frequencies
  • App crashes on 3G S after update
  • Low frequency response cut due to voice recognition

Requested features

8 requests
  • Add German language support
  • Add NC and NR curves
  • Make background mode optional
  • Improve compatibility with newer iOS versions
  • Add option to overlay readings
Show 3 more
  • Add zoom functionality for frequencies
  • Improve calibration for external mics
  • Add pink noise output

Plus Audio MPS

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

RTA

One-time2
  • STC -- Transmission Loss$9.99
  • Reference Curve Files$9.99
None

Plus Audio MPS

No in-app purchases

Questions

Is RTA free?
RTA costs $4.99, and also offers in-app purchases.
Is Plus Audio MPS free?
Plus Audio MPS is free to download, with no in-app purchases.
Do RTA or Plus Audio MPS have ads?
Neither RTA nor Plus Audio MPS shows ads.
Which is updated more often, RTA or Plus Audio MPS?
RTA ships an update every 3 months, and Plus Audio MPS fortnightly. Most recently, RTA was updated on September 24, 2026 and Plus Audio MPS on September 8, 2026.

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