Is there another app like snapchat for iPhone?

Me and my friend wanted to get snapchat. I got it, but her parents are too overprotective and think its unsafe. I don't know how to tell them it's not. So is there another app like that that we could use? If so what? Please give an app that can be searched in the App Store. Not a link.

I think Facebook made one called Facebook Poke

Try grindr