I use Daily Comics Reader as CBR and it doesn't have huge arrows, nor does it have an amateurish UX.

I agree that an improved Twitter client is needed, but Veskuh is still pushing updates to Tweetian so who knows how good it's gonna be in a few months. For me it works fine though but a few features are missing. Not enough for me to install an Android client, I love Tweetian too much for that, but it would be nice if they could be implemented.

As for note-taking apps: I want a native OneNote app