Get rid of the background that randomly changes color.
Get rid of the moving screenshots. Anything that's randomly moving is distracting viewers from your message.<p>Change the headline to explain what it does.<p>Change the subhead to elaborate on it's benefits.<p>Tell me what the features are, instead of an adjective, which really doesn't explain anything.<p>Overall, it needs way more copy to explain exactly what the app does and why people should buy it.<p>On the signup page do you really need a username? You could use the email as username. Also password confirmation might not be essential. Change call to action to something like "Sign up now ->" instead of "Send activation".