SteemReply sounds like it'll be a useful tool. I am happy to see the Steem Keychain integration as I think it's super important that we stop needing to potentially give away our login credentials to service providers to use the Steem blockchain.
When I log in, I see:
Hopefully, someone replies to this comment so I can try out SteemReply. To help new users immediately use the utility, it would be nice to populate the inbox with the last 7 days of activity upon first login. If it already does this, my apologies... not sure when my last activity was.