Restoring my iphone? Battery drainage?

So lately my iphone has been draining battery so fast. And i have looked up that i should restore/restart it. But if i do that will i lose my apps? I do have them on my computer but will i get them back on my phone. Also i have flappy bird (yes i still like the game) but since they discontinued the app if i restore my phone will i get it back?

i have the iphone 5. IOS 7

Itunes automatically backs up any connected device.

so let the backup take place, and then click restore in the summary tab…

and if your iphone battery lasts a really short time your iphone is getting really old.

you might have to buy a new one. No electronics lasts forever.

and because of this Apple keeps making and selling newer, better versions of the iphone; to fix this uncontrollable issue of phones dying out.

I bet it is something simpler. Try a standard reset first. I suspect you have too much running at once, you don't close stuff down and causing a power drain.