I like to keep thing simple:

I intentionally do not use third-party analytics or ads in Yugioh Duelist's Binder, and collect no user data nor cookies of any sort.

​

We have access to your camera or photos library only for adding a new cards to your collection (it's not a option, not a requirement), but this data are stored only on your own devices, and, where appropriate, you may choose to backup-up or sync through iCloud.