You can send funds to with a link to the post you want upvoted.

There are a couple of types upvote bots like minnowbooster you can check their page at any time to see if they have any votes in your range of income.

Then there are bid bots they have a total vote rate and many of them accept bids for lets say a 2 hour period the value that you bid changes your pay payout eg if the total bid where 100Sbd and you bid 80 you would get a very significant portion of that vote round.

Warning it is very common for people to loose money on these bit bots because a whale can make a massive bid right at the end of the round and trash the payouts for small bidders.

you can track a lot of the bots here Steem Bot Tracker Bid at your own risk and try and only choose bots that have max post age no longer than 3.5 days or sheriff @grumpycat may just flag away anything you gained.

Want to increase your post pay out? Take your time with your posts, write about something you care about and learn mark down.

Info provided by your friendly @asapers