PassCamp offers personal, family, teams, and enterprise plans. While there is a free, limited version of the personal plan, the unlocked full version runs for € 2.50, billed monthly. As a note, since PassCamp is a company based in the EU (Lithuania to be precise) all prices are set in euros.
If you are outside the EU, you will be subject to fluctuations in exchange rates, which means the monthly bill may change from month to month. With that in mind, U.S. customers can expect prices to hover around $3 per month for the personal plan to $4 per month for the Teams plan, which is pretty competitive.