Reviews and Recent Comments:

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  A Google user: This apk is excellent, looks good and runs a amazingly well (inspected with the pettersson 500-384 USB mic) on Nexus 6p and Nexus 7. Bill has been extremely helpful with responses via email and I wouldn't hesitate to purchase this once more. £5 is a bargain!
  User rated this game 5/5 on 2016-05-04



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  Stephen Burnett: This apk is a full-spectrum recording system for a ridiculously low price. I can now hook my ultrasonic microphones up to my smartphone or smartphone and receive recordings without needing to haul out my computer. The apk is easy to use and does things that I used to need a full desktop computer and thousands of dollars worth of equipment for! If you have a microphone that it supports you could have this apk. Developer also very responsive and helpful. We communicated by email and he added a fresh feature to create the tool easier to use in about a day.
  User rated this game 5/5 on 2016-02-29



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  A Google user: This is a long-needed apk to let visualization of audio signals acquired via usb, for smartphones that have a usb host. The apk has a nice interface, intuitive controls, and a very helpful player manual. Although it only works with a couple of microphones at the moment, the developer has plans to add more in the future. An simple and inexpensive method to turn your smartphone into a full-spectrum bat detector!
  User rated this game 5/5 on 2016-02-14



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  Martin Woolley: Running this apk with a Pettersson m500-384 and a Samsung s6 and nexus 7 smartphone. Everything works good so far, however I have only been using it for a week and unfortunately the weather has been too awful for bat detecting. I had 1 problem with my smartphone crashing when locking the screen whilst recording. Bill responded to my email very quick and the problem was resolved within 12 hours. Satisfied with this apk.
  User rated this game 5/5 on 2016-06-05



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  ELEANOR BALLARD: Sorry but the apk authorisation has not been granted.....shame because it had awesome reviews.
  User rated this game 1/5 on 2016-07-06



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  Joseph Olson: This is an perfect spectrum analyzer. I particularly appreciate the developer's quick response to my request for a logarithmic scale. The application works flawlessly.
  User rated this game 5/5 on 2016-05-28



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  Donald Endicott: A remarkable program for amateur and experienced bat aficionados. Exceptional functionality and documentation. Well thought out and implemented.
  User rated this game 5/5 on 2017-05-19



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  Justin Halls: This is actually a lovely apk, with a nice interface and the settings mostly let me to record in the method I like to. It would be nice to have the continuous recording mode break the recording into 4 or 5 min files, but I can receive close to the same result by using triggered recording and just hoping there is enough background to hold the device triggered. Only three stars because it only works on a few devices. Ok on my Samsung Galaxy S6 edge (Android device 6) with a Petterson M500-384. Also works on a Xiaomi Redmi 2 (Android device 4.3) with a 20cm OTG cable but not with 0.5 or 1m cables. On my Teclast smartphone with Android device 5.1 and my Oukitel K6000 Pro (Android device 6) they detect and recognize the microphone (and its 'active' light turns on and off) but no data appears on the screen at all. Shame as I bought the Oukitel specially for batting as it has a nice really big 6000mAh battery.
  User rated this game 3/5 on 2017-01-29



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  A Google user: Unbelievable piece of tool, does everything you should wish as a spectrum analyser and ultrasonic detector, good work. thankyou!
  User rated this game 5/5 on 2017-10-31



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  Raimund Specht: This is a nicely designed apk that works flawlessly with a number of various USB ultrasound microphones. The competent developer is quite responsive and added help for fresh microphones very quickly.
  User rated this game 5/5 on 2016-05-03



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  Chris Bester: The developer sets the benchmark for response to enquiries and requests. Good! Although the basic focus of this apk is wild life orientated, the features are unmatched. One of the best audio spectrum analyzer apks accessible for Android device, with or without an ultrasonic microphone. Thanks Bill.
  User rated this game 5/5 on 2016-08-25



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  A Google user: I bought this apk to use with my Echo meter touch 2. It does not work . The details for the apk states it works with the Echo meter touch, I presume it means the old modal which is no longer accessible. This is very misleading. It does not work with the Echo meter touch 2.
  User rated this game 1/5 on 2018-07-18