Nutrition labels on products are displayed on an individual product-by-product basis. While standard, the effectiveness of this practice has been increasingly criticised due to consumer information processing biases. Digital technologies that present information in simpler, more accessible ways at the point of purchase are increasingly used and demanded by consumers yet we know little about how they impact decision making. One way to assist consumer processing of the available nutritional information is to present it in a more aggregated format (e.g., for the basket) to overcome numeracy biases. This study investigates how a calorie counter aids consumers in making food choices. An experiment was designed which presented consumers with aggregated calorie information and compared the choices made to those with individual product nutritional information. The results show the calorie counter leads to a reduction in the amount of calories chosen by about 9% - that is, higher than estimates of the effectiveness of the UK’s 20% sugar tax (5%). Results were moderated by other factors such as shopping duration, time pressure and consumer type. Though such technologies offer much promise and can assist users by providing more customised and relevant information further research is needed to develop this stream.