For In-App buyers
Your In-App purchase is tied to your account. Thus, when Calendar Snooze is reinstalled or if you transfer to a new phone, your In-App license will travel with your account.
This means that you will have to log in to your phone using the google play account on which you bought the In-App purchase.
For Key buyers.
The Calendar Snooze Key licensing system is no longer available (version 3.1.+)
For PayPal buyers.
The Calendar Snooze paypal activation system is no longer available (version 3.0+).
If you have a new phone, please contact me at: firstname.lastname@example.org
And provide me with your old phone serial/imei. Then i will activate the key on your Google Play account.