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RTA app for iPhone and iPad


4.0 ( 4640 ratings )
Utilities Music
Developer: Andrew Smith
4.99 USD
Current version: 11.2, last update: 8 months ago
First release : 14 Dec 2008
App size: 32.94 Mb

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.

Pros and cons of RTA app for iPhone and iPad

RTA app good for

Extremely handy tool for the audio folks, an RTA in your pocket. iPhone is somewhat limiting at a mere 105dB max and noisefloor of 28dB on my phone but for most basic quick tweaks, this will do the job. Of course if you get a real mic, this app is priceless. So Nathan and Luke, stop reading this and buy it already :)
Great app, works well, real easy to use and easy to calibrate. If you are looking for an inexpensive RTA this has got to be the one.
Nice. But would be even more useful with NC and NR curves as well.
I was hesitant to buy this app, thinking there was no way it could be remotely accurate. But since it was ten bucks, I figured it must be somewhat professional. So, I bought it, played with it a little, and then tested it against my analysis rig. I use smaart v.6 with a sound devices usbpre and an audix tr40a mic. I set up my rig and tested this app against it and was blown away by the results! Its very accurate considering the hardware it uses, and is a great app to have as a pocket RTA. Its not as accurate or in-depth as smaart, but its handy and is less than 1/100th the cost of my setup (not including the computer required to use it.) Overall, a great product. I have since bought studio sixs tone gen and polarity check and am pleased with them as well.
Others have already stated the strengths of this application. So Ill just restate how convenient it is to have it with me at all times. You never know when you might be called upon to ring out some stage monitors....
I was at work (Im a live sound engineer) and we were discussing speaker phase, when I said "They should make an app so you could test spkrs with iPhone." It didnt take long before I found all the Studio 6 products. I now have SpeakerPop, GEN, SPL, & RTA. They all work wonderfully. That said, I was a little disappointed to learn about FFT. Its not made too clear in the descriptions, but FFT is basically a more accurate & detailed version of RTA. I wish Id bought FFT, since I want the most accurate thing availible. However, Id already purchased RTA, & because of App Store rules, I cant trade it in towards FFT. If youre going to spend $10 on an app, you are probably going to use it for work like me, so splurge & get the $20 FFT. I am debating it, my main hangup is that Ive already spent $10 on the RTA app.

Some bad moments

Yet another update that does not address the biggest -- well, only -- flaw in this app: it still continues to run after you exit it which drains your battery. ------------ I wish the author would make the battery-draining background mode optional. ----------- The author continues to tweak many aspects of this app, but it still keeps running after you exit it which drains your battery. ----/--/ Same thing again. The author obviously likes to drain your battery. --------- New do-dadhs, but it still drains your battery if youre not watching. ---------- Still has no way to turn off -- much less to default off -- the battery-draining background operation. Despite many updates, this app hasnt had a favorable review since 2013. ------------- Another update and the battery-draining background operation continues. I really cant understand why this cant be made optional with the default being off. ---------- With each new update, I hope that they will finally remove (or at least make optional) the battery-draining background mode. But, this latest update is unchanged in this respect. ----------- New iPhone 6. Latest everything. Still drains the battery by continuing to run after you exit the ap. ---------- Well, they did it again. Another update and the battery burn continues. -------- What can I say? The battery drain continues in yet another update. No wonder this is no longer the most popular RTA in the Apple store. When will the author fix this? ----------- Another update and the drain continues. --------- Another update retains the battery-draining background operating feature. When you exit this app, it keeps running and sucking your battery. You have to manually kill it. This single "feature" just ruins this otherwise excellent app for me. ------------- Yet Another update and it is clear that the developer feels that this battery-draining background feature is somehow desirable. I have given up. Obviously, they do not read these comments because we have yet another update and the background battery drain remains. They obviously like this "feature." -------- Ive been a huge fan of this app for years. I consider it essential for live- sound work. But, recently, they added this "background" mode in which the app keeps running even when you exit it. To stop it, you have to manually kill it... a big and inconvenient extra step. And if you forget to kill it, it will run down your battery. When youre mixing a show, you dont want this extra step. This silly "feature" is a disaster. I have complained and complained and yet this "feature" persists. There are other Real Time Analyzer apps. If you are looking for one, despite how good this app is, I suggest you look elsewhere because of this one overwhelming problem.
The author continues to tweak many aspects of this app, but it still keeps running after you exit it which drains your battery. ----/--/ Same thing again. The author obviously likes to drain your battery. --------- New do-dadhs, but it still drains your battery if youre not watching. ---------- Still has no way to turn off -- much less to default off -- the battery-draining background operation. Despite many updates, this app hasnt had a favorable review since 2013. ------------- Another update and the battery-draining background operation continues. I really cant understand why this cant be made optional with the default being off. ---------- With each new update, I hope that they will finally remove (or at least make optional) the battery-draining background mode. But, this latest update is unchanged in this respect. ----------- New iPhone 6. Latest everything. Still drains the battery by continuing to run after you exit the ap. ---------- Well, they did it again. Another update and the battery burn continues. -------- What can I say? The battery drain continues in yet another update. No wonder this is no longer the most popular RTA in the Apple store. When will the author fix this? ----------- Another update and the drain continues. --------- Another update retains the battery-draining background operating feature. When you exit this app, it keeps running and sucking your battery. You have to manually kill it. This single "feature" just ruins this otherwise excellent app for me. ------------- Yet Another update and it is clear that the developer feels that this battery-draining background feature is somehow desirable. I have given up. Obviously, they do not read these comments because we have yet another update and the background battery drain remains. They obviously like this "feature." -------- Ive been a huge fan of this app for years. I consider it essential for live- sound work. But, recently, they added this "background" mode in which the app keeps running even when you exit it. To stop it, you have to manually kill it... a big and inconvenient extra step. And if you forget to kill it, it will run down your battery. When youre mixing a show, you dont want this extra step. This silly "feature" is a disaster. I have complained and complained and yet this "feature" persists. There are other Real Time Analyzer apps. If you are looking for one, despite how good this app is, I suggest you look elsewhere because of this one overwhelming problem.
Great app so far. Does what its says but I hoped it played music from my iphone and ran this app at the same time for $9.99
This does not work as well as I hoped. What a waste of ten bucks. I wishbthere was a lite version of this I could have tried first.
This program puts on a nice light show but thats about it. After noticing a distinct difference between speach response curves as compared to my Frye Box (A $7000 sound analyzer used for hearing aids and speech mapping) I decided to check the calibration of the program and its awfull! A 1KHZ Pure Tone shows up as a nearly 4khz and a 250hz tone shows up as 1.5K. There seems to be no way to calibrate the program either. This program is waste of $$$ BEWARE!!!
When will this work again? It was great with iOS 6 and before. All it does now is freeze when it is opened.

Usually RTA iOS app used & searched for

rta, rta lite, rta audio, rta pro, and other. So, download free RTA .ipa to run this nice iOS application on iPhone and iPad.