Free usage depends on the region an account was opened from

An account that has never bought credit and was opened from one of 41 countries, including the United States, Canada, the United Kingdom, most of Western Europe, Japan and Australia, receives the full free machine time. An account opened from any other region receives 15 minutes of a default sandbox (2 vCPU, 4 GiB): 1 GiB-hour of machine memory and 0.5 vCPU-hours of active CPU. Buying credit provides the full monthly free usage in every region. Free saved copies and disks are the same in every region. See free usage by region.

100 free hoursin your first 30 days.

of a 1 GB machine

No credit card
Four sandboxes at once, 2 vCPU and 4 GiB each
Then prepaid credit from $10, no plan fee

Start free, no card