Daily Screenshot is described as 'sends email automatically every hour or once a day with one of following attachment:
Screenshot of a website
Screenshot of running computer' and is an app in the Photos & Graphics category. There are six alternatives to Daily Screenshot for a variety of platforms, including Windows, Online / Web-based, Chrome OS, Google Chrome and Safari. The best alternative is Awesome Screenshot, which is free. Other great apps like Daily Screenshot are web-capture (Free), Webshot (Freemium), SiteShoter (Free) and SnipZero (Free).
SnipZero is a convenient zero-install screenshot app that lets you take screenshots right from your web browser. No installation required. You can select any application window or browser tab as source.