It would be great to see free code Titter apps like Fritter and Twidere adding full support for Mastodon, to help Titter refugees transition to the #fediverse. With an app that supports accounts on both, they could post and interact mainly in the 'verse, while still keeping in touch with their Titter friends while they encourage them to migrate too.
@strypey
I know Twidere supports Mastodon. In the accounts section > add account, Mastodon is a choice there. I mostly use Fedilab though.
@adam @strypey I was using #twidere for the last few years for this reason. It's not the best client (threading was buggy for me, ux a little quirky) but my timeline showed tweets and toots together, and when I posted I could choose whether to post in either place, or both.