Spectroid

This is the best spectrum analyzer on Android and I've tried many. It's a very accurate and fast analyzer. And I appreciate the color choices, it make it easy to see peak signal, current signal, clipping, and the heat map. My only gripe I wish the app didn't pause when you turn your phone from portrait to landscape, but that's a minor gripe. That and I wish this app existed for my iPad.

Looks awesome with certain types of music. Any music with a piano or harmonic type instrument shows up clearly when you use it. Kicks, snares, claps, and hi hats as well, if you know what to look for. Very useful in eyeballing certain melodies of songs if you can't pick which notes are played in your head. Useful and fun. Also note: the quality of the visualization is directly proportional to the microphone quality, distance from sound, and the volume of sound.

Carl Reinke has as one person put it, gifted the world with his totally free application. Once you figure out how to set it up. It shows the river of sound that surrounds us. There's absolutely zero advertisements. It works online as well as offline. You don't even have to have any internet whatsoever. I will say that it is better to use multiple phones. Because some have better microphones than others. I would tell everyone that uses this to try using all of the phones that you own. Best app.

I like the app but it would be really cool if you could actually load like a calibration file then make your mic a little more accurate. it seems odd it doesn't have the different weightings to choose from. I'm assuming unprocessed is basically flat or unweighted? I'm not sure. But I would pay something for giving it a few more features and the ability to load a calibration file would be really cool. Maybe to load and save charts too.

As a part time audio engineer, this is great for me. I tried it with a couple of other similar apps, and this one seemed to be the cleanest, most precise, and reliable. Awesome when I need a little help nailing down a feedback frequency or hiss in a new microphone 4 stars because I can only seem to get it to register up to 24kHz, when I need it up to 28kHz. Also would be nice to be able to export the data. Small complaints for a great app though.

Stop looking through apps, this is the one youre looking for. Period. Great specrum viewer app, I use it on many devices. Works flawlessly on all but the oldest of them(were talking android 2 era devices, so it has a pass). I've been using it for years and I still find neat ways of utilizing it. About the only thing it lacks is a record function, but you can always record the screen or screen cap.

Seems to work very well, very stable and precise. However, you don't know if the source audio speaker and reception mic produce said audio accurately or not. No way to know for sure. Even with whatever source you start with, you still have to trust the author it is what they say. Eg: Said audio on internet is 1150 hz. After played on phone and picked up with another phone, app says 1152 hz. However very steady. You would have to be in a sound studio for something better!

Frankly, this app helps restore my faith in humanity. Simple. Clean. Elegant, useful. No ads, no popups. I know the author points out he can't calibrate but just for fun, pull up an online tone generator on an adjacent computer and try comparing the results. I'm using this to debug some objectionable noise from some industrial fans. What a nice find. Thanks. Like a few others, I'd love the ability to record an audio clip along with the spectrum analysis. Not a big deal though. Bravo

I have been using this app for about 2 months to analyze a varying high frequency noise through the interior and exterior of my home and capture the db levels. I was surprised that it measures the frequency levels also! however, it would be extremely germane to my needs if the recording was also audible. It does not interface with a player to hear the sounds it records. I hope you work on that.

Awesome app. Only suggestion would be either a way to output the graphs to a file that you can load or picture or the ability to make the line a little bit thicker so it stands out more in screenshots. All of my screenshots the line looks like it's 5 pixels thick and it's hard to see. Also if you did picture or file outputs being able to caption them would be useful for when I do measurements I can know what each one is of.

Best app, I use it for bass music. I like how easy and responsive it is. I look for songs with bass frequencies from 25-35 hz for my subwoofers. I wish it worked with internal audio. That would be great! Thank you for creating such a great app. This brings me back to earlier times when it was all about great apps with no catches. This is one of them. Thank you very much!

This app was recommended to me by a friend who also heard "THE HUM" . This app lets you set parameters and can also zoom in on certain frequencies. Works better with use of a microphone. This app is one of the more sensitive ones out there. Like most apps, you have to be play around with the settings. If you don't understand the labeling to say, just look up the words and it will make sense.

This appeared to be exactly what I was looking for for use with HAM radio in the HF band. Even though I gave it 5 stars it does seem to have a deficiency, but perhaps I just haven't figured something out in the audio settings. It needs control over a base signal level to give more contrast between signal and noise (HF bands are noisy). With a low signal to noise ratio it is difficult/impossible to get a clear view of the signal signature. It does provide a waterfall display without connecting up to a PC so it is doing what I want it for. To the developer. Is there a window function and/or other audio settings that will give the ability to tone down noise to get a better contrast?

Tried one or two others but then I found Spectroid. This is an amazing app. If you are an older sound engineer like me, you know there are feedback frequencies you can't even hear but younger audience members probably can. I can usually pick the frequency but sometimes you get dual-tone feedback that is harder to nail down. This app picks it up nicely. Some EQs light up the freq but I have 2 DBX 231s GEQs that do the job, as long as I can pick the frequency. Great app!!!

I highly suspect the person that made this app simply wants to gift it to the world. Either I'm blind but when I looked around there was no 'rate me' button that I expected to find. I had to go back to the store to write this! The nerve! Anyway, this app auto works without any configuring involved. I was able to check my speaker and phone if indeed those 17khz-20 were actually playing and not bc my ears can't hear them. Simple. Effective.

Requires a little bit of knowledge to get it reading accurately. 'Out of the box' it was reading a 1kHz tone at 916Hz. Go for the largest FFT size your device can handle and aim for the Decimation value in the middle somewhere. Once configured correctly for my device it is great, and the waterfall feature is a lovely touch. SMAART for your pocket.

Very, very well done app. Additionally, it would be nice, if it would also be able to record sound in wav format, so data could be exported and analyzed further in a spreadsheet program. It would be perfect, if one could then also choose lowest and highest frequency for recording a file, so if one is interested in a special frequency region, only, not needed frequencies will not be recorded. This could lead to huge file size reduction and open up new application areas.

Thank you! Your app saved me from going nuts on two occasions already. First there were these spots in my house with very low frequency noise, which i didn't even hear at first, i have only noticed being stressed for no reason in those spots. It turned out to be a combination of two fridges and an ac unit doing a weird interference. Next, i had a high pitch, barely audible even by night. It was an LED bulb. I had no idea they can make noise. I was only able to find the sources with this app.

Very fast and reasonably accurate with 0 baggage attached. If I had to criticise something it would be the black lines in between the frequency ranges covered by adjacent decimations, but they are only really noticeable once you zoom further into the spectrogram. Perhaps they could be hidden visually even if still present "behind the scenes".

I was looking for exactly this app today and I'm so glad I found it! but if there was one thing missing that would make this completely perfect for what I am using it for, it would be an optional setting to display the current peak frequency as the closest musical note instead of / in addition to the numerical frequency. Could also just be accomplished with simple labels on the x axis of the spectrum - I'll just do it manually with a marker for now though, haha.