modify the Sign-In Station page to render properly on a phone browser.
In lieu of an Android app, add a Sign-In station type of "Phone," or modify the Sign-In station page style sheet to recognize when it is being viewed from a mobile device, so that it is more usable, and readable when accessed from a phone/tablet browser.
Coupled with a barcode scanning app/keyboard, it is possible on an Android device to set it up as an AccuClass Sign-In Station, making use of the device's camera to capture QR codes.
However, the page is badly formatted and difficult to read.
Creating a style sheet that formats the page properly on Android phones and tablets should be a simpler solution that creating an app.