it's only asking for your posting key. you can only post with your posting key. there are quite a few steemit tools which requires your posting key.. I think it's fairly safe to say it's legit. I've just posted a short video to try it out.. ! @furion ...have a word & (nice work)
https://upload.view.ly/view/outerground/086d--2017-08-12--winters-end-promo
here's viewlys website ... it all looks fairly well thought out and above board !
@limbodrones check it out
@furion is a steemit monster... watch out l