NSUserDefaults sync?

[dannymichael]

I am developing an app with in-app-purchases. If the user did make a purchase on his iPhone, I would like to save some hash to NSUserDefaults. After syncing the user's iPhone, iPad and/or iPod with iTunes, I would like the purchased feature to be available on each device.

1) Does iTunes sync NSUserDefaults to all devices?

2) Is NSUserDefaults somehow connected to the users AppleID?

3) Would this be the right way for remembering en 'transfer' to multiple devices?

4) Is transferring some hash possible without using the In-App framework?

5) Is it possible to check the AppleID with which the app is purchased?

Thanks in advance!

[BrianSlick]

No.

No.

No.

Maybe.

Not inherently. You'd have to do something manual.

[lukeca]

Is the in-app purchase going to be the "non-consumable" type? If so that type of in-app purchase works the same way as app purchases do, so if a user purchases it on one device it will be free to purchase it on their other devices as long as they use the same iTunes account.

[dannymichael]

Thanks for the answers. I'll give it a spin. Everything would be solved if Apple adds the 'subscription'-type to [[SKPaymentQueue defaultQueue] restoreCompletedTransactions]

[lukeca]

Oh, there have been other threads about this, if it subscription based then I think you pretty much have to run your own server and the user would have to set up a username and password, then on other devices they own they could enter the username and password which would authorize with your server to unlock.