Round Up is a free Chrome add-on developed by jimmy.cerone that aims to save users from the psychological tricks employed by online stores. This add-on automatically rounds up prices to the next whole number, allowing users to evaluate costs without falling for the retailers' pricing strategies.

With Round Up, the deceptive practice of round prices down is countered by rounding them up instead. For example, a product priced at $34.99 will be displayed as a flat $35.00, providing a more accurate reflection of its true cost. By eliminating the illusion of a cheaper price, Round Up helps users make informed decisions when shopping online.

It's important to note that Round Up may not be compatible with all pricing configurations and therefore may not work on all websites. However, for those sites where it is compatible, this add-on can be a valuable tool to combat the psychological tricks employed by online retailers.