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Excuse my ignorance, since I haven't JBed yet, but does it say this somewhere in a link, since so many people seem to keep making the same mistake that you say?

Edit: Great I ask a question for once and get nothing!! :)

Sorry to be over a month late, but I saw this and didn't wanna leave you hanging .aggie. Officially Apple states that you can use the application immediately after downloading ( See Bottom Right side of page under "Download apps." ). Yet I have been told by Geniuses ( Apple, not real Geniuses ) that it increases the stability of the OS if you restart the iPhone after every download.
 
Iphone Apps closes right after opening

i am already registered in itunes. so what's the process. help me out!!!!!!!

(these are the instructions for a PC, a Mac may differ?)

Open the iTunes app (not itunes on the browser, but the actual application)
click "store"
click "authorize computer"
follow the instructions
when finished sync your iphone

When I did this the sync began noticing the applications
 
Give more details on what you've done. Have you deleted all your apps and reinstalled? Deleted any and reinstalled? Does it happen for adding just one app from the App Store and not having any others?
This started with only 1 APP on my iPhone 6 and it's my business APP all the others work fine. My APP on others phone and not on others, customers are telling me. They think it's from the last upgrade to the phone.
 
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