No, Paprika Cloud Sync is entirely optional and not required to use the app. By default, your recipes are stored locally on your device itself and can be accessed directly without setting up an account.
Paprika Cloud Sync is only necessary if you want to sync between devices or keep your recipes automatically backed up. However, we would definitely recommend using Paprika Cloud Sync to keep your data backed up in case you lose your device or need to replace it in the future