You sure can! 

curbi is a free service for up to two devices.

The curbi Free account is a restricted account, that allows you to active 2 devices, use 1 Bedtime Rule, use the "Timeout" (limited to 5 mins) and view a reported list of installed apps.

You don't need to enter a credit card or provide anything more than your name and email address so that curbi can send you status information about your account.