question

Hi, I'm in the middle of implementing IAP v2.0. The code in the SampleIAPEntitlementsApp shows that after an entitlement was bought, it is stored in a database locally on the device. Do you absolutely have to save this information locally? Is it possible to retrieve information which entitlements the user bought on app start up? Is this possible with and without internet connection? If you absolutely have to store the information locally how are other devices of the user notified? Regards, Ben