I just bought that Solo App by Tom Quayle & David BeeBee

hollywoodrox

It’s really good ,I knew a lot of my intervals ascending but found it difficult descending 
  It’s jolly good fun to play with & you soon end up having them embedded in your head 
  After a while . I’d highly recommend it to anyone who needs this type of knowledge .
  You can work on finding notes , working on single or multiple intervals , finding intervals on chordal progressions etc . It’s quite accessible to anyone  

if you like the sound of it look at some videos on YouTube to see if it would be suitable 

Axe_meister

Alas full functionality only available on iphone. Feel a bit short changed on Android

hollywoodrox

Ahh that’s a shame , he did address this on a recent video , it wasn’t apparently selling very well on Android . I’m using it on an iPad . I don’t use a mobile but I do have an old iPhone that I use as a portable camera/video camera/portable computer etc .