Well let’s see if the Apple support article HT2519 is really true!?
Apple Support Article: HT2519 explains How to re-download apps that were on an iphone and are no longer on the computer that they were synced with. They only lived on my iphone since I reformatted my PC and I haven’t reloaded all my music and except for the back, which I don’t have reloaded on the pc…
Below are the instructions, you might keep in mind however that if you don’t remember all the hundreds of apps you had on your phone = ME! well then you are going to have to go to itunes and look at your purchase history. Just click on Store in itunes => View My Account and once that page opens, click on Purchase History…
Yeah I am busy at 12:52am on a Friday Night/Saturday Morning downloading all of my previous apps! Good Night and Good Luck, to me!
To redownload the app to your computer:
1. Make sure you are signed in with the same account used for the original purchase.
2. Locate the app in the App Store and click the BUY APP button.
3. You will see a dialog similar to the one below. Click the Buy button.
4. You will then see a dialog similar to one below. Click OK to continue with the download.
To redownload the app to your iPhone, iPad, or iPod touch:
1. Make sure you are signed in with the same account used for the original purchase.
2. Locate the app in the App Store and tap Buy App.
3. You will then see a dialog similar to one of the examples below. Tap OK to continue with the download.
Additional Information
1 If the application is no longer available for download on the App Store, then you will not be able to redownload it.
Read more about syncing purchased apps from the App Store in this article.
For information about troubleshooting apps purchased from the App Store, see this article.