Free cross-posting tools
Two tools, no signup, nothing stored. Both answer a question about your own workflow — and both will tell you to keep doing it manually when that is genuinely the right answer.
Two tools
Cross-posting workflow builder
Pick your source and your destinations, see the flow as a diagram, and get the count of how many uploads each post really costs you.
Reposting time calculator
Your posts per week, your platforms, your minutes. Hours per week, month and year — and a dollar figure only if you supply the rate.