Neither of those apps even work the same way that Snapchat does. Personally, I think snapchat is kind of silly and not really needed. I do love Skype Qik though.
Well, CyberDust is perfect - you can draw, caption photos which clean themselves up - which is what my SO and I want.
I kinda need a screenshot feature though because we're sentimental (no, there aren't any nudes flying around) and while her iPod screenshots, with a warning, I want the same, but sadface Windows Phone can disallow it.
Kinda stupid, its such a minor detail, but oh well. I want a sort of safety toggle or something.