Build an Android COVID-19 Tracking App (Robinhood Style) – Kotlin Open Source

In this video, we build an Android COVID-19 tracking app using core UI components from the Robinhood stock trading app. The app displays key metrics around the growth of coronavirus, including the number of positive cases, negative cases, and deaths per day. We use data from The COVID Tracking Project (

Link to code: The app is ~200 lines of Kotlin code, and the app size is less than 3 MB. Download it from F-Droid:

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Libraries used:
➤ Retrofit:
➤ Spark from Robinhood:
➤ Ticker from Robinhood:
➤ Nice Spinner:

0:00 – Intro
3:41 – Retrieving data from the API
21:53 – Building the layout
31:59 – Render the spark line chart
41:00 – Add chart interaction
55:23 – Add colors and state spinner
1:12:17 – Ticker view + radio button styling
1:25:26 – Color update + conclusion


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