Background The availability and use of mobile apps in health and nutrition management are increasing. Ease of access and user friendliness make diet-tracking apps an important ally in their users’ efforts to lose and manage weight. To foster motivation for long-term use and to achieve goals, it is necessary to better understand users’ opinions and needs for dietary self-monitoring. Objective The aim of this study was to identify the key topics and issues that users highlight in their reviews of diet-tracking apps on Google Play Store. Identifying the topics that users frequently mention in their reviews of these apps, along with the user ratings for each of these apps, allowed us to identify areas where further improvement of the apps could facilitate app use, and support users’ weight loss and intake management efforts. Methods We collected 72,084 user reviews from Google Play Store for 15 diet-tracking apps that allow users to track and count calories. After a series of text processing operations, two text-mining techniques (topic modeling and topical n-grams) were applied to the corpus of user reviews of diet-tracking apps. Results Using the topic modeling technique, 11 separate topics were extracted from the pool of user reviews. Most of the users providing feedback were generally satisfied with the apps they use (average rating of 4.4 out of 5 for the 15 apps). Most topics referred to the positive evaluation of the apps and their functions. Negatively rated topics mostly referred to app charges and technical difficulties encountered. We identified the positive and negative topic trigrams (3-word combinations) among the most frequently mentioned topics. Usability and functionality (tracking options) of apps were rated positively on average. Negative ratings were associated with trigrams related to adding new foods, technical issues, and app charges. Conclusions Motivating users to use an app over time could help them better achieve their nutrition goals. Although user reviews generally showed positive opinions and ratings of the apps, developers should pay more attention to users’ technical problems and inform users about expected payments, along with their refund and cancellation policies, to increase user loyalty.

The gap between environmental attitudes and behaviors has been on research agendas for a while. Despite the enormous efforts of all concerned parties to increase consumer engagement in environmental issues, the levels of individual environmental concern are still higher than actual green purchasing. Considering the shortcomings in theory and practice, the purpose of this paper is to examine the link between environmental concern and environmental buying behavior by introducing three mediating variables, namely consumer environmental knowledge, perceived consumer effectiveness, and perceived personal relevance. The hypotheses were tested on a sample of 319 consumers using structural equation modeling. The results show that environmental concern predicts environmental buying behavior. Environmental concern also influences consumer knowledge, perceived consumer effectiveness, and perceived personal relevance, while environmental buying behavior is affected by knowledge and effectiveness. The model testing confirmed a partially mediated model. The findings offer several avenues for public policy makers, academics, and socially responsible companies that find the environment important.

No abstract

No abstract

This paper presents a brief overview of the development of the wellness tourism literature. In addition, an analysis and presentation of the topics that appear within this literature field are given. The purpose of this research was to point out the relevant topics that have attracted research efforts over time. In order to detect these topics, we have selected wellness tourism literature articles from Web of Science. Our analysis used topic modelling tools using a machine learning algorithm in Python. The results imply the distinction between two main research topics within wellness tourism literature – wellness and health and medical research. Such differentiation also matches the development of the wellness tourism research field itself.