Spectroid

It's not bad but it needs a few additions to make it usable; Add a peak hold, or at least a stop so you can see what as going on. The display jitters so much that you cannot read frequencies being displayed - there just isn't time. Add an averaging function. This will also allow a human to read it. Allow larger fonts!

Brilliant spectrum analyser. The waterfall display reveals so much about the audio with harmonic distortion being plain to see on frequency sweeps. It would be great if this data could be output as a CSV file.

Great app with a few musing missing features like recording lengths of audio input, exporting the spectrum as... a picture maybe, pausing the flow, a switch to the internal audio. Then this would be a 6 star review.

Very neat, well designed and implemented app. The zoom features work exactly as I'd expect, and the settings give me a lot of control over how audio is captured and analyzed. Surprised and delighted at the quality!

I never wrote reviews, but this is the greatest app ever. I go around "looking" at every sound I see. I wish this could just be a live wallpaper

Really Nice and well​ done app, lot of tech config, zoom/pan intuitively implemented. A nice feature addition could be capture/replay, and import/export from some standard format like wav, ogg or mp3. Kudos for the Authors!

Holds peak, id's frequencies on pause, accurate according to lab arbitrary waveform generator. Only addition wild be cursors to jump between peaks when paused!

App works very well and also looks nice. Would be cool, if it was possible to hide the 0-10hz range by default, to make room and increase the resolution for the rest of the graph.

Unbelievable that it's free! Thanks dev! Love everything about it. A help section detailing the different settings would be great for clueless n00bs like me, though.

Very good and responsive spectrum analyzer. A useful missing feature would be to have an option to display musical note name along with the frequency.

A very promising app. Would like to have 1/3 octave analysis and it would be great if it could be used with an external USB microphone with calibration facility.

Great analyzer, gives a very accurate reading considering it uses a phone microphone. Recommended. It would be nice to have the various notes of each pitch and this would be very easy to implement.

Great adjustability for instrument and voice analysis purposes. Max hold easily lets me assess the relative frequency "fullness" across the spectrum as an instrumentis being played, for voicing and setup

Awesome! The most fully featured, performant android app for spectrum analysis I've yet used yet

Best spectrum analyzer app by far. Intuitive interface using two-finger swipe and zoom for adjusting both axes. And FAST! Great app.

Has become one of the first apps I install on a new device. Incredibly useful and completely free. Author rocks.

Good and thanks for developing this, especially for free. But I'd like to be able to specify the frequency domain of interest and only have the fft performed on that... with millihertz discretization. Specifically, I want to be able to regulate the beat of a mechanical clock with it, where the signal is detectable in the 1-6hz range and a 1hz difference will make the clock be off by six hours per day.

Awesome! It immediately identifies and labels prominent frequencies even with a lot of ambient noise. Great performance. No unnecessary permissions.

After some trial and error tweaking it remains the only app if it's kind on my phone.

Not sure what Mike's review is about. There has always been a pause button in the corner. By touching the screen, you can see the gain at any frequency Great app

Absolutely perfect! I'm obsessed with frequencies now.

Great app. Would have been amazing if there were options for I/O, like analysing a recoded sound file and saving the results as images...

Spectacular, vivid app! Super sensitive and accurate reading! If you could implement the recording feature by the time, it would make your development A+. Thank you

Seems pretty useful so far, but is there anywhere to get an explanation of settings for people have an idea what they do, but not completely?

Would love the ability to make waterfall fullscreen, and invert it's direction. Other than that, it's an easy 5 stars!

Awesome, better than the rest ... or at least, the other one I tried

*Excellent* app. Thank you, Carl :-) (update: also added to my Huawei Mediapad T7.0)

Would be perfect with 3 more features: being able to change color maps, saving and loading waveform sounds files (.wav).

Really good spectrum analyzer. Works beautifully. You can pinch the frequency scale to zoom in/out. I wish it had a setting to adjust the time scale in the waterfall.

Hey dev, can you add the fullscreen feature? i really like your work.

waterfall, adjustable bins, what more could an audio engineer want? May be a built in Freq gen?

Does exactly what it promises, and does it well. Fascinating app to use during choir or band.

Beautiful app!!! Could use a time scale on the waterfall though. You can make really pretty patterns with music playing in the background

The Best of the best! Thx so much guys for this app!

Needs an easy file save interface. Need the files for court.

Amazing app, would love even more if it had a timestamp or ruler in the fft window. Thanks for the excellent job.

It's very impressive but I am finding it difficult to use it by I think with time I would learn how to use it

I just found a blank area at 375-380hz and 750-770hz etc... It looks harmonic.. any details on that?

Is there a way I can input a recorded audio file as input?

Does exactly what it says on the box! And doing it good, no ads and for free. You're the best!