Spectrum Analyser

If it has option to DFT the earphones audio it will be damn perfrct

Frequency and time analysis with a decent variety of basic algorithms.

Great features, but text is too small to read and buttons too small to tap on smartphone. Would be better on tablet. No way to calibrate app with cal file, but you can export data as CSV file and then do your own calibration vs known calibration mic in a spreadsheet.

This is so nicely done... I used it to figure out the troublesome frequencies of CPU fans that gave me headache. I wish I could give an extra star for keeping it (ad) free.

Truly the best mic analytics app of any app store around. Just what I was looking for. Helped me find resonance frequencies for common objects suprisingly well and easily by highlighting the frequency with the highest amplitude.

This is a great app! If you know spectrum analysis, this does it very well. It's easy to rack your peak Hz, max amplitude and ID basic sound signatures. Highly recommend.

Not only opened on my phone

It has no ads and they don't make my phone glitchy.

Bad never try it

Faz um app com todos os seus softwares

Was able to sideload this to my Sony Smartwatch3 and it works perfect on that too.

If your serious about your audio gear this is the app ! ...awesome

best can analyzed "db" and frequency upto 22khz on my phone

If you want a versatile sound analyzer that will tome out your speakers, car, auditorium, church, studio, for the very least amount of $$$ GET THIS! You can hook up a really good mic if you know what to do, then the input is really decent (accurate). GRACIOUS!

Only additions I'd like to see are a calibration utility for stock mics, and an external mic option with same calibration ability. I'd pay for those in a heartbeat. Bad reviews for crashing: sorta OK, device may not be powerful enough to run full steam. Bad reviews for "not what I expected(what the hell did think when you dl'd an FFT app!?!)" "Too complicated(again, see above)" you just dl'd lab grade SW for FREE!! Wish it had external input/cal options for vibes like in/s², in/s, in, for accelerometers.

After reviewing half a dozen of the top rated free spec analyzers, this is the best by far. To the morons who gave this one star, you neither understand nor have a use for this type of app so keep your opinions to yourself.

Terrible rta... still looking for an android rta app that is decent for when smaart I'd not handy or quite needed.

Easy to use and with a lot of functions. Wish to have a trigger and time span setting. So it does not have to continuously updating. Free and ads free and no extra permission needed make it top of the line.

Wow ... this is awesome. A must for an audiophile. This can be used as a scientific tool. We could had used it at NASA for stress analysis. The sensitivity, response is phenomenal. The flexibility Impressive. Congratulations guys.

A good practical app. I have a lot of their apps and they have a couple of common threads; small size, quick start-up, decent graphics and readability, no ads. If your phone or tablet has good hardware, get them all.

It's the only one that found to keep up with the guitar solo in Lynyrd skynyrd's firebird even with the cord change thumbs up from me

If your serious about your audio gear this is the app ! ...awesome

Nice and easy to use, with many options , and no need my ID to install.

Tried 7 different spectrum analyzer apps and this is my nr 1! I'm surprised that this high quality free app has an average score.

Great features, but text is too small to read and buttons too small to tap on smartphone. Would be better on tablet. No way to calibrate app with cal file, but you can export data as CSV file and then do your own calibration vs known calibration mic in a spreadsheet.

Try in combination with a function generator (on another device)

Impressed how much functionality and control is packed into such a small memory footprint. Superb.

My favorite setting is the setup custom Y scale

App speaks for itself

Extremely capable app!

This app has helped me RTA a room. Could use a little better help in app, but does refer to web site. I recommend this app.

This is really very good.

I am looking like this for aloooong time :)

Pretty good. I also suggest pitch lab. I have tinnitus and am doing some research.

Impossible Its Really Good

professional and free - as always from keuwl.

I would have been happy to pay for this app!

Tons of features, fast.

Hey man, I would have gladly paid for an app like this. It works, has a simple enough interface *and* allows for CSV recording!

Keuwlsoft is tearing it up with great test and measurement apps for FREE, too.