ⓘWindows SmartScreen may warn that this is an unrecognized app the first time — click "More info" then "Run anyway" to continue. This is expected for apps distributed outside the Microsoft Store.
How to install
Tap "Download for Windows" above.
Open the downloaded installer from your Downloads folder.
If SmartScreen warns you, click "More info" then "Run anyway".
Open TapBill and sign in with Google to get started.