Suspicious data hog

I came across this, seemed like it would tip me when a spam number is calling, and had good reviews, so i downloaded it. I was a little suspicious from their privacy policy saying how they share data but I made an account, put in my number, verified, all that. It put two contacts in my address book with almost 2000 listings total of spam/scam numbers, which I thought was good, so itd show up when getting a call. However, after having this app running for several minutes (and maybe even with it not running) my phone seemed to burn through about 50MB of data, and it the meter kept turning for no apparent reason. Nothing was different except the app, so I deleted it, rebooted my phone just to be safe, and the data usage stopped. I figured, though, at least I have those contacts so my phone would say if its a known spam number. However apparently deleting the app also deletes those contacts, which seems a little weird since its data in a different app that Whitepages ID needs special permission to alter. Oh well, so much for that.

Cal-AL about Hiya: Spam Blocker & Caller ID