Well, it is a website-wrapper / lite-app-creator / web-app-shortcut.
Basically it creates a link to a website which, once you open it, acts like a normal android application.
That way you can have a very small Facebook app, a battery friendly Twitter app and more from just using the Anker. And due to multi-window support and free-to-choose icon packs one won't even notice that you don't have those bulky normal apps installed.
Anker means Anchor in German
I do not serve ads and I do not track you. Not at all. And don't you worry about me starving, I have got a job as a Softwareengineer to pay for a living ;)