How to save a purchase?

So I was reading documentation, watching some examples on Youtube on how to set up IAPs, but I still don't understand how to save a Non-consumable purchase. Should I do that myself manually? If so, what's the best way of doing it for Google Play and Appstore?
Thanks in advance.

 

You could save purchases locally on the device, or not. Let me explain several approaches for this:
- use PlayerPrefs (not secure, but you could encrypt them)
- use a cloud save provider (for example PlayFab, which includes receipt validation and a login system)

Or do not save it at all: you can access the product.hasReceipt property of Unity IAP after initialization. If it returns true, the product was purchased before and you can e.g. set a bool on your game manager script for accessing it and unlocking your game content now or later.

 

Thanks!

 

What if there are IAPs but also Items that can be bought with Currency inside the game? How do I save those skins fo instance?
Also how do I keep the coins the player has?

I prefer to avoid Player Prefs