this app is not a good experience for the user. They added their own ads that are annoying ads that follow you as you navigate the app. The company is definitely making a lot of money on this app. There are probably a lot of wordpress sites that don't even realize the nature of these ads since it happens with the latest upgrade. They are probably hoping that wordpress owners do not check. It gets really frustrating when you always have to check to see if the plugin you use from other companies are honest. Also it is probably something that you will get panelized by google since google only allows a certain amount of advertising on a site. Also these ads are not targeted toward your site's related content.
It is better to do your own plugin.