There are, of course, hundreds of thousands of apps you might consider installing, but I think most people will agree that only two are absolutely essential for everyone:
Hypnotic Spiral: https://play.google.com/store/...
(sample review: GREAT APP ESPECIALLY IF YOUR STONED OR DRUNK OR ANYTHING ELSE,TRIPS U OUT,I USE IT WHEN I'M ON ANOTHER LEVEL,WHEN I'M ON THE MOON STONED *****)
this will allow you to make anyone else do your bidding, making a large majority of other apps completely redundant.
I Ching - Divine Your Future: https://play.google.com/store/...
(sample review: 'Excellent! The only I ching app that uses sticks and not coins. Much more reliable. The editable entries are also a bonus. Great work, thanks!' )
This will help you make all the major decisions in your life, including what apps to install. It is also useful for understanding the plot of The Man in the High Castle. I meditated on your situation, and using the yarrow stalk method received the wisdom of Hexagram XLII ('The second SIX, divided, shows parties adding to the stores of its subject ten pairs of tortoise shells whose oracles cannot be opposed. Let him persevere in being firm and correct, and there will be good fortune.'). I hope this is helpful.