[softawre]

Cool experiment.

I don't agree with how you say that 10% is the Quoted Interest Rate, because Stripe isn't doing that. They are saying they have a fixed fee. "Interest rate" means it compounds.

[davidpolberger]

If the HN hive mind can agree on better terminology, I'd be happy to update the calculator.

[dbkahn]

I would say something like "Loan fee as a percent of amount lent" or (if you wanted to keep it consistent) "Fixed fee as a percent of Principal"