This wikiHow teaches you how to find and restore apps you've deleted from your iPhone.
Steps

Step #1. Open the App Store
The app has a blue icon with a white cartoonish compass in it and can usually be found on your home screen.

Step #2. Tap on Updates
It's in the bottom right corner of the screen. The button has a blue square with a downward arrow.

Step #3. Tap on Purchases
This is at the top of the page.

Step 4. Tap My Purchases next to your Apple ID when prompted
This screen will appear if your iPhone was previously linked to multiple iCloud and Apple ID accounts. If you immediately see a list of apps, you can skip this step.

Step 5. Tap Not on this iPhone
It's on the right side of the screen, next to All. You will now see a list of all the apps you have ever purchased but are no longer on your iPhone.

Step 6. Tap the cloud icon next to the app you want to restore
The deleted app will now be downloaded to your iPhone.
- If you don't see the deleted app you're looking for in the list, you can also search for it using the field Search at the top of the page, just above the list of apps.