If you've purchased from Google Play
Your Unlimited purchase is fetched from your Google Play account, make sure the Google Play app on your devices is logged in with the account where the purchase was made from. If you're not able to sync your purchase via Google Play, please follow Google Play's Help Article for help. If your Notewise Unlimited status doesn't appear, please follow the steps here.
To sync your purchase across multiple devices, please follow these steps:
If you've purchased from Stripe
You should heave received an activation code (make sure to check your email's spam folder), this activation code can be used on 1 device only. However, if you need to change the device where it is activated, you can choose to deactivate on an already activated device and re-activate on another device.