Native Android App
You can install the Hello World Counters Android app from Google Play.
Or you can download and install the APK from GitHub Releases.
You can run the Hello World Counters web app in your browser on Android, ChromeOS, iOS, Linux, macOS, Windows, and more.
Hello World Counters is also a Progressive Web App (PWA). You can easily and conveniently "install" it on your device so you can access it in the same way you would any other installed app.