Configuring Mobile Apps to Work With wallabag.it

Steps to configure the app

First create a new client in the Developer section. The name of your app doesn't matter as much as the Client ID and the Client secret. Write these two values down.
When you download a mobile app, it's going to ask for the server address of the hosted wallabag instance. With wallabag.it that is: https://app.wallabag.it.
It's also going to ask for the aforementioned Client ID and secret. Please insert those in the text fields, when asked.
Lastly you need to provide your username and password. These are the same credentials you use to login in to wallabag.it.

Please also have a look at Android. Especially the section on known limitations.