I don’t want your personal information. Keeping it safe is more trouble than it’s worth having.
Priority List app
Priority List is a very simple app that does not collect any information about you nor about your device.
Priority List does use banner ads. If/When you click a banner ad, the advertisers will be notified of that so they can build more information about your interests.
Website
I don’t bother with cookies. It’s possible that some are baked in with WordPress, but I wouldn’t consciously share them anyway.