OPTIMAL is described as 'Online custody calendar that allows parents to easily schedule and track parenting time as well as monitor compliance with their custody arrangement' and is an website in the office & productivity category. There are four alternatives to OPTIMAL, not only websites but also apps for Android, iPhone and iPad. The best OPTIMAL alternative is Split Schedule. It's not free, so if you're looking for a free alternative, you could try BestInterest for Coparents. Other great sites and apps similar to OPTIMAL are Co-parenting Clarity and Our Family Wizard.