I want to know about free allowance and pricing plans

[lubien]

Maybe this conversation will be helpful

How concerned should I be about a surprise bill?

The simplest option if you are concerned about billing is to use prepaid credits: So e.g buy $10 of credit. You can greatly limit even the potential for costs by not using e.g auto-scaling. With Fly, by default that is turned off. So if you only create e.g 1 vm, that is all the compute capacity you can be billed for. If it were to get a billion requests, it will simply not be able to respond. Your site/app would be down as a result, but you would not be billed for more compute than that 1 vm…

And if bandwidth ever goes up by a million because of a mistake do let us know, we don’t want to bill you for a mistake.