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Is it possible to get Android or iOS device unique id and given access based on unique id if I approve particular device to access the page then it's accessable otherwise display message you are not authorize this page.
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Answer accepted by question author
I don't know how in iOS. In Android you can take a look to https://developer.android.com/training/articles/user-data-ids and implement it in the "Android" platform specific code,
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By the way, for iOS, you can generate a UUID by yourself, then save this UUID to the Keychain. Whether it is deleting and reinstalling the app, or upgrading iOS, you can get the generated UUID.