SteemNow is a tool mainly used to check how much a steemian's %upvote is worth. It also shows you that steemian's voting power, latest upvotes, curation rewards, author rewards and latest posts. How to use it? It is use to check how much an upvote is worth before bidding for an upvote from a bot. You can visit on their website (https://steamnow.com). You type a username in the box and press 'Save'. It will show you how much an upvote from that person is worth and you can drag the slider to whatever percentage you want to check on.