Usability Evaluation of the Karafs Application: A Qualitative Study Using the Think-Aloud Method

Abstract

Background and Aims: The Karafs application, a popular mobile health tool in Iran with nearly 5 million users, supports personalized diet plans, healthy cooking, and sports training. This study aimed to evaluate the usability of the Karafs application using the think-aloud method to identify user interaction challenges and enhance its effectiveness. Methods: Fifteen participants (2 men, 13 women; mean age 22 years) evaluated the Karafs application using the think-aloud method. Usability problems were identified, categorized, and assessed for severity. The evaluation process was analyzed, with an average duration of 10.58 ± 3.46 min. Results: Multiple usability issues were identified, primarily related to unclear system messages and navigation challenges. The severity of problems was classified, with most being minor but impacting user efficiency. Conclusion: The think-aloud method effectively identified usability issues in the Karafs application, providing insights for improving user experience. Addressing these issues can enhance the application's functionality and support healthier lifestyle choices.