I am making a Twitter for Apple Watch app called Jay.
I've just released a new version and it brings much improved VoiceOver support.
App Store link: https://itunes.apple.com/app/jay-for-tweeting/id1432449486?ls=1&mt=8
It supports most of the functionality you'd expect from a Twitter app: reading your timeline, tweeting, retweeting, liking, trends, search, etc.
In addition, you can save tweets on your Apple Watch and later access them on your iPhone, where you can open links using Safari, or browse hashtags and users using your favorite Twitter app. Currently Jay supports the official Twitter app, Twitterrific and Tweetbot.
Jay is totally free. And if you like it you can leave a tip using the in-app-purchases.
I'd love it if you tried it and let me know what you think!