You can find and download the BillTrack50 app for free in both the App Store (for iOS and MacOS devices) and Google Play (for Android devices). Searching and tracking within the app is free; saving lists and sending notifications to your fellow advocates requires a subscription. If you have a paid subscription to BillTrack50 then you may also want to explore the Mobile Stakeholder Pages option to share bills from a bill sheet to your followers using the app.