App or program	Purpose	Platform		Price
American Academy of Pediatrics Family Media Plan	Online tool to help families create a media use plan and set house rules	Online only https://www.healthychildren.org/English/media/Pages/default.aspx		Free
Anti-Social	Blocks all social media sites for preset periods of time	Mac, PC http://antisocial.80pct.com/		$15
Boy Scouts of America Cyber Chip	Online games that teach children of different ages how to use social media safely	Online only http://www.scouting.org/cyberchip.aspx		Free
Concentrate	Allows users to identify activities and certain distractions (e.g., websites, programs) to block when the activity is started	Mac (compatible with OS X 10.5 through OS X 10.9) https://www.macupdate.com/app/mac/31945/concentrate		$29
Focus	Removes on-screen distractions	Mac https://heyfocus.com/		$19.99 for one license; pricing varies for multiple licenses
Freedom	Blocks certain websites or apps in general or at particular times of day	Mac, PC, iOS app https://freedom.to		$6.99 per month $29 per year $119.99 per lifetime
LeechBlock	Blocks certain websites or apps in general or at particular times of day; also tracks total amount of time spent browsing particular sites	Mac, PC (via Firefox browser extension) http://www.proginosko.com/leechblock/		Free
SelfControl	Blocks access to distracting websites, apps, or programs in general or for preset periods of time	Mac https://selfcontrolapp.com		Free
StayFocusd	Allows users to set self-imposed time limits or predefined periods of time during which social media use and web browsing are allowed	Mac, PC (via Google Chrome browser extension)		Free