PD001 - A MOBILE AND WEB-APPLICATION TO SUPPORT LONGITUDINAL NUTRITION STUDIES

PD001

A MOBILE AND WEB-APPLICATION TO SUPPORT LONGITUDINAL NUTRITION STUDIES

M. Abouelhoda¹, M. Elattar², R. El-Habibi ³, D. Zakaria⁴, M. Hussien⁵, T. M. MOSTAFA^5,*

¹Genomic Medicine Center of Excellence, King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia, ²Nile University, Giza, ³Egyptian Aquatics Federation, ⁴Tropical Medicine, Ain Shams University, Cairo, Egypt, ⁵DigiTAAM FZCO, Dubai, United Arab Emirates

Rationale: Longitudinal nutritional studies are effective for studying diet-wellness & diet-disease relationships. Data management remains a challenge in obtaining unbiased and accurate results. Recent advancements in mobile technology and wearables provide an effective means for data management. In this abstract, we introduce our free nutrition app to support researchers/nutritionists in managing the complex data of longitudinal studies.

Methods: We developed a patient-facing mobile app (In-Twin) and a web-based app (Doc-Twin) to support researchers and nutritionists. The systems are  available for both iOS/Android. The mobile app tracks diet intakes, physical activities, sleep patterns, and other health metrics, and it can register deviations from planned meals (Figure 1).  For healthy participants, the mobile app can suggest 7-days meal plans based on AI algorithms. The app also provides reminders for meals registration, sample collection, and upload of laboratory reports

Results: After launching the apps, we conducted a questionnaire to measure the adoption in Egypt between April 2025 and March2026. Before the app, the researchers used non-structured paper forms.The researchers asked the patients to download InTwin app. The study included 8 researchers and 835 participants. The questionnaires were based on the SUS (System Usability Scale)  and MAUQ (mHealth App Usability Questionnaire). Analysis of the results revealed that 85 % of participants supported the Apps, 80% found the Apps robust & easy to use, 83% found the Apps had the expected functions, and 90% found the app provided an effective means to contact the participants.

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Conclusion: The app is well tested and is free-of-charge for research use. Our usability study revealed growing interest and recognition of the app value. The researcher identified challenges related to presentation of diverse data and need for integrated analysis tools; a topic for future work.

Disclosure of Interest: None declared