For me, the history of my text messages is a feature, not a flaw. I'm assuming this is "Snapchat for texts." We've already seen that Snapchat can't guarantee that photos aren't saved. The same limitations will almost certainly apply to Skim. So will this be anything more than a crippled texting app?
Your value proposition is rather unclear. Whom is this aimed at and what advantage do you offer them?
So they point out a limitation of face to face communication, but instead of creating something that would remove this limitation, they artificially introduce it into another form of communication that didn't previously suffer from the same limitation? What a joke.
It's generally a good idea to put labels on your input fields, or at least any indication of what's meant to go there; the placeholder is insufficient because the input is automatically focused. I had no idea so I just put in a series of swear words.
Half a screenshot and half a description? Why would I give you my email address for that again?
What's new about it? Is it just for mobile? I generally need a little more information before I'm gonna sign up for spam.