Oracle's free tier ARM VM's specs were recently halved so now they only give ARMs with 2 CPUs and 12GB of RAM [0].

Still great value though, have my app's website and associated infra on one of those 4CPU/24GB in "pay-as-you-go" mode and never ever reached the paying threshold.

[0] https://docs.oracle.com/en-us/iaas/Content/FreeTier/freetier...