Some crisp screenshots in this One Pager for an upcoming “Promise Sharing” iPhone app call ‘Promishare’. Nice touch with the Apple Store download button transforming into a “Get notified” button.
This website has unfortunately been redesigned or gone offline, so I have removed the direct link to it. The screenshot below hopefully preserved enough of the design but if you are really keen to inspect further, try this Archive.org link. FYI: the site was first featured on 25 June 2014.