If they are fairly low traffic sites with small databases (< 5 MB) that don't require SSL or more than a daily cron, they should fit within the parameters of a free plan - i.e. "blossom" database server, 1 dyno, etc.
If they are fairly low traffic sites with small databases (< 5 MB) that don't require SSL or more than a daily cron, they should fit within the parameters of a free plan - i.e. "blossom" database server, 1 dyno, etc.