How do I see my Purchase History on the App Store?

You can view your purchase history on the App Store :

1. Open the App Store app, then tap Today at the bottom of the screen.
2. Tap or your photo in the upper-right corner, then tap Purchased.
3. If it is on a different device. tap the tab "Not on this iPad" on the top. 
4. Find the app that you want to download, then tap the cloud icon to download the app. The app downloads to your device.

For older versions of iOS:

1. Open the App Store by tapping on the icon.
2. Tap the Purchased icon on the bottom menu.This displays the list of apps purchased by you.

You can also view your purchase history using iTunes (as an app)- click here to read How to see my purchase history using iTunes. 

1. Open iTunes
2. Click Sign In to enter your Apple ID and password that you had used to make the purchase. 
3. Click your name and tap the Account Info from the menu. 
4. Enter your password again. 
5. Scroll down to Purchase History. To the right of the most recent purchase click "See All". To see the details of a purchase, click the arrow to the left of the order date. Your most recent purchases are first.

Click here to read more - How to see my purchases made on the App Store- using iTunes