pull down to refresh

There is no native app but we have a progressive web app that you can install. It should look & feel like a native app. Depending on your browser, you should have been prompted to install it. Else, you should find the option to install in the context menu of the website:
Here is an example how to install the PWA using Brave Browser on Android:
pull to refresh, sticky header, reply notifications
All of these are available in the PWA except sticky header.