How do I transfer my app when I purchase a new phone? Alyson September 18, 2020 03:02 Updated No problem. Just log out and delete the app from your old device before installing and logging in on your new device. Related articles Can I buy just the app? Is there a trial period for NuCalm? What is the difference between NuCalm and other apps or devices in the market? Are there any side effects of NuCalm? Who can use NuCalm?