If you are reading this, probably you have an undecided thought right now. And I have one too while typing this! So lets get rid of them!
Just think what you are undecided about ("What to eat..?", "Who should start the game?" or "This dress is good but idk..." ), then type in your choices. Finally when you are done, tap "Choose!".
Then you see your winner choise... So its basically a random decision maker. Thats it!