The worst over-estimated by 299 kilojoules (71 calories) and underestimated by 45 kilojoules (11 calories). The kilojoule measures used in the apps differed by an average of 127 kilojoules (30 calories) from the actual nutritional measure, but this varied significantly between the apps. “Although they’re clearly not perfect for managing weight loss, apps are becoming increasingly popular for both consumers and clinicians,” said lead author Juliana Chen, a dietitian and PhD candidate in the Charles Perkins Centre and Faculty of Science. The study is the first in Australia to comprehensively test the quality and evidence base of dietary weight loss apps, and the first in the world to test kilojoule measures reported in the app against the reference standard for Australia.Īfter examining 800 apps for the study, researchers selected 28 apps that were weight management-specific and allowed for logging food intake.Įach app was used for five days and assessed against a range of quality measures: the credibility of their information source the accuracy and coverage of scientific information the inclusion of enhanced features (like barcode scanners) usability and, most importantly, their likelihood of changing health behaviours. A screengrab from the Noom Weight Loss Coach app.Īustralian app Control My Weight and Calorie Counter Pro were jointly rated the second best apps.
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