objective c - How do you store information a device even after an app is deleted? -

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i trying allow user try trial of in app once. how store information after user deletes app user cannot reinstall app try trial again?

you can use keychain, because keychain items not deleted if app removed device. (it may removed "secure wipe", stated here: https://stackoverflow.com/a/3885110/1187415, not sure that.)


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