I swear every time I check the reviews, a bunch of them are just like kids complaining about stuff they don't understand or mad that there are IAPs, so they give the dev a lecture on why their business model sucks cause their parents won't give them money for it
like so many apps
and i see a bunch of these bogus ones, they're useless
honestly i use AppRaven and I pay 2 bucks a month for premium to get notifications and it's really nice, I've found a ton of neat apps on there and they notify you when stuff is on sale