It's very simple: We don't collect or sell your information and we never will. Period.
Push to Spock does not save anything you've typed or any other data about you, and it does not communicate with us in any way.
Apple sometimes gives us reports about crashes in our apps, but these reports don't contain anything about you or any of your data.
It's conceivable that a future version might send us more technical data, but the dying Sun will burn Earth to a cinder before we collect any of your personal data. (We're pretty serious about this sort of thing.)