Speech & language apps for Android

[gutted2014]

Totally jumping on the bandwagon here & stealing ideas from a couple of other threads I've seen but does anybody know if/where I can download some very basic, preferrably free apps for my Hudl, for DS with severe (12 months at least) speech delay & suspected (by SALT) ASD? He is 2.11, but speech & language at least a year behind.

I am trying to do the exercises the SALT has set, but also have DS1 (5.2) & DS3 (3 weeks) who demand my attention, so if there is something like this which could occupy 5 minutes here or there it would be great!

TIA