What is the Interval Recognition-Ear Train application, how does it work?

According to the introduction of marchantpeter.co.uk, Interval Recognition-Ear Train is a Education app on the Android platform. There is currently a 4.07 version released on May 29, 2017, you can see the details below.

Ear training for intervals, clusters (harmonic), phrases, modes / scales, tuning and perfect pitch.

High quality sampled piano plus midi sounds.

Listen feature to compare the question to all possible responses in order to find and understand the right answer.

Helps to associate intervals with common melodies to make them easier to learn and remember.

Extensive options including tempo, instrument, note velocity, pitch range, rhythm plus responses to correct and incorrect answers. Very customisable questions - from a phrase using eg only perfect 4ths and 5ths to a cluster using eg Dorian on F#.

Continuous Play - repeat question a set number of times then display the answer before moving on to the next one. Optional text to speech for announcing the root note and answers. Basic speech recognition for entirely hands free use.

This is the free ad-supported version - there is also a Donate version available which does not contain ads.