After downloading the app for the first time, you’ll be asked to create an account. In that account, all of your notes it’s gonna be safe and secure. You can delete the app or download in another device and all you have to do is log in into your account. I personally think it’s more reasonable to add this feature only to those who use the paid version of the app. With your account you can, not only access your notes anytime anywhere, but also feel safe about not losing your notes.