This client can change accounts. And these timelines are updated using streaming. When you get a notification, it is notified your desktop.
This client has many shortcuts, so you can control this application with these shortcuts. And you can jump another timeline to type Ctrl + k which is jump function.
You can choose the dark theme like Mastodon web. And if your screen is narrow, you can collapse the side menu.
Whalebird can search hastag, and show hashtag's timelines. And you can create a list, and show list's timelines.
You can filter your timeline. Please write some regular expression to filter the timeline.