First of all, I think its awesome that you can even do this live FFT on a phone. I found a bug in that if you pause a plot, leave the app and come back, the peak trace disappears and you get a continual pop up message of "Error reading audio. Already Open?". An immediate add on that would really make this app is a draggable cursor or two that would display the value(s) at the cursor. What would put it over the top would be an ability to make waterfall plots and/or color maps of the FFT time history. I already paid a buck. I'd pay $10, easy, for color maps. This is on an HTC One M8.
Best of it's class I recently installed and evaluated at least 6 (I didn't keep exact count) apps that are competing with this app. I found that this app delivers the feature set that I was looking for in addition to being well executed in terms of stability and user interface. People reading this review may have feature set requirements that differ from mine, so YMMV. I particularly appreciate the zoom and scroll capabilities. Quite often I want to use the entire screen width to view a narrow slice of spectrum in order to re
Good start Basic functionality good. I'd really like a save option for a csv file with the data in it as well as image. I also occasionally get an 'error opening audio' problem on Galaxy s5. Small nerd point-fft can only be done on power of 2 length samples yet you can set the value to anything. Are you padding the input data with zeros? Might be best to stick to 256, 512, 1024 etc.?Happy paid for app, price fair for functionality.
Great tool Nice app. I use it occasionally has an Audiologist. It checks out well against tuning forks (within 4Hz). It does need an easy way to save images to the gallery, though. Highly recommended. 7/2014: Rating increased to 5-stars since the "save to gallery" issue was fixed. Thanks! I can actually save the images and export them to our EHR database to upload into a patient's chart for reference. Geektastic!
Good value for the money. I had read the other reviews and downloaded. I needed a analyser to investigate a high frequency. I did not have my normal professional one to hand. I was surprised at how accurate it was. I used it to investigate a area where customers were saying they could hear the Surveillance tone from our voice alarm system. Our tone is at 20 KHz so I thought this would be very unlikely. I used this program and found a 18 KHz tone present that was not generated by our system.
Made in USA! After reading reviews for the other apps, I felt this one was the safest. Shows the sad state of Android when we install based on least-potential-harm rather than benefit. Worked fine and a decent interface a well. Good job and hope it makes you a million:-)
Fixed save to gallery
Major GUI updates
Reduced memory footprint
Switched to use standard android icons
Couple more bug fixes
Changed the title layout
Added beta test of log scale for paid people
Bug fixes to a couple crashes
Will retain purchase information if can't check with google servers (no reception)
Minor fix for the in-app purchase