As mentioned above, if you have an iPad Garage Band is a no brainer. (It has many features of the top notch Logic X DAW and is free)

Android you are pretty much stuffed so look elsewhere.

Laptops/2 in 1s look at Ableton Live, (Intro version) also if you buy a decent interface (Focusrite & Steinberg do some great entry level) a lot already come with Ableton Lite as well as other programs to get great sounds.
Have fun.

Bill