Comment by catapart

Right; should have been more specific, thanks!

I meant to ask if the app syncs P2P over the internet, rather than just through their provided storage.

My solution is to have short-lived data so that they can't reach more than a few MBs of memory on my server, but if there's a straightforward way to do P2P across the globe, I'd very much prefer that option. Asking people to believe that I can't look at their (encrypted) data is fine, but preventing me from having their data at all is ideal.

Given what you pointed out, I definitely figure they're not doing WWW P2P syncing, but you'd be surprised the technical stuff you can figure out by just asking someone who spent way too long building it. They're usually happy to tell you all kinds of interesting details (especially when it comes to 'interesting' bugs/workarounds/hacks)!