Honestly, using #Phanpy feels a lot like using the #Mastodon web UI if it had been in 2 years of additional development. Lots of stuff people have been asking for, beautifully implemented.
Give it a try if:
- you've been overwhelmed by a reply thread on Mastodon because it's all just a big flat mess
- you'd like to see quoted posts actually unwrapped
- you'd like to see threads as threads
- you'd like to see notifications bundled
And yeah, it's all open source.