SpecDrum is available at this link :
android specdrum
There is also a Free app called Audio Test on GooglePlay which
measures and displays HAL audio delay or latency on your android device.
It has screen pictures of the new SpecDrum and the user manual.
Audio Test is available at this link :
audio test
Historic article is available at this link :
wikipedia history
The Android SpecDrum currently runs on Tablet and Tv box.
and Requires a Minimum Screen Size of 1024 dp by 600dp
Kitkat or Greater Operating System.
Phone version currently under development.
A big hello from the designers of the SpecDrum
Alan Pateman and Peter Hennig
(c) 2017 specdrum.org.uk.
The Android SpecDrum is on GooglePlay store.