No. All of the processing is done on your own device.
We are really big on user privacy! Since iOS devices contain such powerful hardware, there is no need for us to use a server for any processing. This has the advantages of keeping your data private on your own device and being lightning fast, while giving you access to it, with or without an internet connection. We use iCloud for syncing which is only accessible with your credentials and we have no visibility of any user data.