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Fig. 1 | International Journal of Behavioral Nutrition and Physical Activity

Fig. 1

From: A review and content analysis of engagement, functionality, aesthetics, information quality, and change techniques in the most popular commercial apps for weight management

Fig. 1

Flow chart of the selection process for apps included in the review. Legend: a Apps that were downloaded less than 10,000 times. In Google Play, the category ‘Installs’ includes the information 15 levels ranging from “1–5” to “10,000,000–50,000,000”. A popularity index, based on the category of installs, was determined to estimate the number of downloads, as described in Garg and Telang’s formula [53]. b Apps that were downloaded less than 100 times a day, based on the rank of the apps. c Apps that received a rating below 4. d Apps that were classified as having “in-app purchases” (i.e., " freemium"). e Apps that addressed other health aspects different from weight management or related behaviours (diet and PA), such as smoking, mental health, pregnancy, etc. f Apps that were workout or activity tracking apps without the aim to weight loss. g Apps whose description was not in English. h Apps that did not have a respective counterpart on the other app store. i Apps that had more than one version (e.g., HD, lite, pro); the basic, fully-functional version was chosen. j Apps that required an external device (e.g., monitor, wrist band) to function. k Apps that were either free or paid but the paid version did not have additional and fully functional features. l Apps that were not available to download after the selection or that were not available for download on the respective devices iPhone 5S (iOS 9.0.2) and Samsung Galaxy S4, GT-I9505 (Android 5.0.2)

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