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.

Change the headline to explain what it does.

Change the subhead to elaborate on it's benefits.

Tell me what the features are, instead of an adjective, which really doesn't explain anything.

Overall, it needs way more copy to explain exactly what the app does and why people should buy it.

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".