Figure 1

Flow chart: schematic overview of the selection process for apps eligible for full review. This flow chart provides a schematic overview of the selection process of eligible apps available in iTunes and Google Play (GP). The initials of the main reviewers are reported as JM and AM. ^aApps on the list of one researcher were untraceable for the other researcher. ^bApps to which the adjusted screening method had been applied and only the titles were screened. ^cApps that were not available in English or Dutch. ^dThe main focus of the apps was not physical activity (PA) promotion. ^eApps that focused on diet and weight loss. ^fThe main focus of the apps was not physical activity (PA) promotion or weight loss. ^gApps that targeted people with injuries or disabilities. ^hApps that targeted children or older adults. ⁱApps did not follow the guidelines for physical activity. ^jApps that did not provide tailored feedback. ^kApps that were detected in the first screening step and were not available for download. ^lAfter downloading the app, it did not work. ^mAn extra monitor or device was needed to receive tailored feedback. ⁿBefore using the app, a credit card was needed to deduct money as a penalty if the user did not achieve self-defined goals. ^oThe same app was available under a different name but with the same features. ^pThe app had a free and a paid version, but the paid version did not have additional features.