can i check my purchase history on my iphone ?
or i have to use pc or mac ?
On your phone you can only view the last 90 days purchases (and optionally contact iTunes Support if you have a problem with a purchase) via http://reportaproblem.apple.com
To view your account's full purchase history you will need a computer's iTunes (Mac or PC) : https://support.apple.com/en-gb/HT204088