For a free app. This is great, and the developer deserves big kudos for sharing it. If you have a mobile friendly template, this can be one element to take the place of a paid system like weaver.
However, I can't give it 5 stars because
support is cumbersome. Maybe it's because it's new? At the time of this writing, it's not immediately clear that the support forum on the link above supports this product. I searched the forum for add2home and found nothing. So I decided to register, it has over the top hoops to jump through, hyper strong password requirement + captcha + 3 security questions + email verification + wait for ? to get admin approval.
That said, without support I got it to work and with the provided documentation customized the images and logos etc. It looks great when it's done. But I can't see if there is a way to keep it from popping up when the user already has it on their device. There is a setting to only show up for returning visitors. For my purpose, it would be best to show up only for first time visitors. But this is not a selectable option. Also, I could not see if there is a way to have it only show up when the visitor opens a specific page or pages, right now it pops up at every page load.