StudyStack has been able to remain a free site for all to use because of the advertisements displayed on the site.
If you would like to use StudyStack without having any ads displayed, you can upgrade to our PRO plan ($1.50/month or $10/year) A PRO Teacher Plan is also available that removes the ads from all sets that you create regardless of who is looking at them.
StudyStack understands that sometimes you may want to use the site without the distractions of any advertisements. For the remainder of your current session on the StudyStack web site no advertisements will be displayed. If you enjoy StudyStack and would like to directly support the continued development of the site, please consider upgrading.