This is an experiment of mine, a changedetection android app that uses the builtin API to get all your monitored websites and show the snapshots. It was made through the Ionic Framework which use reactive frameworks like vue.js for the frontend and javascript behind the scenes to communicate with the API. It is basically a webview-based app. In the first screen you\’ll be prompted to input the base domain of your changedetection.io installation and its API key. Rest assured that these values never leave your android device, since they are stored locally, in the localStorage of the inbuilt webview app. 
It\’s a read-only app, it only reads your data and presents it on the screen, allows you to view each screenshot of the your watched links, and some details, nothing beyond that.
It is a preview version, which you can download at [https://drive.google.com/file/d/1v9zIpq6mBWRN4Y5gTF39B4TwzmnYOLn-/view?usp=sharing] .