keepassxc does this the right way — you're not picking the "iteration count" (which is hard enough to understand even for someone relatively technically inclined), but the time it takes to open the database. The default is 1 second, with the minimum of 100 ms.

"Higher values offer more protection, but opening the database will take longer".

I highly recommend keepassxc to everyone instead of these password-solutions-of-the-day that are coming and going so fast it's hard to remember all of them.