Do you play any games on your smartphone? I'm looking for single player ones to kill some time when waiting for the bus. Ideally they should work without an internet connection, so I can disable network access for that app and play without ads.
I'm currently playing Words of Wonder, but it gets repetitive after a while.
Lego Star Wars The Complete Saga has an excellent port of the game thats exactly 1 to 1, and its only around 6 dollars. Fully singleplayer and offline, and its a nice nostalgia trip, can even do co-op.