These are my apps - all disabled/turned off. All development/minimal resources - was testing if my very simple app even deploys on fly.io. It succeded, now I want to develop in on local before hosting again.
Got reply from support, pasting for future reference for anyone with the same problem.
It looks like you had a 1GB db, which would be your charge for extra RAM, as well as a few 40GB volumes. Both of these things are outside our free tier. The amounts are still accumulating in your billing because it can take a little while for our metrics to hit Stripe, so it has not updated yet with how long you had the db and apps running. Once that all catches up you won’t see any further charges build up. That said, we do not charge for anything under $5