New app from the makers of Secret sends you mysterious notifications throughout the day

Notifications on your phone usually bring with them some sort of dread -- your weather app is telling you it's about to rain, or maybe there's some important email that needs answering. Worst of all, someone might have tagged you in another embarrassing Facebook photo. But Ping, a new mysterious new iOS app from the makers of Secret, is trying to make notifications something to look forward to. The dead-simple app has no usernames or passwords, and it doesn't ask to look through your address boo...