iOS device users can check the purchase history in iTunes Store, App Store and within the device.

Check Purchase History within the device
1. Go to [Settings]
2. Select your [Apple ID]
3. Go to [Media & Purchases]
4. Tap on [View Account]
5. Scroll down and select [Purchase History]

Check Purchase History through iTunes
1. Open iTunes and click the [Account Icon] on the top right hand corner.
2. Select [View My Account] and login
3. On the Purchase History page, click the [See All] button.

See your purchase history in the App Store or iTunes Store