It may happen to accidentally delete apps while doing the daily stuff on your Apple device so rest assured that data can be restored. All the user needs to do is follow the procedures:
- Open Apple Store and click on Purchased at the bottom of the screen. When working with an iPhone or an iPod touch, you need to click Updates and then the Purchased button appears at the top
- Afterwards click on Not On This iPad/iPhone tab at top
- Last but not least, look for the deleted apps and tap the cloud arrow for redownloading the app. Sign in with the Apple ID Password when required.
Source: OS X Daily