A total of 28 publications were identified as eligible. A framework with a 3-level hierarchy was designed which grouped 328 individual barriers and facilitators into 23 subcategories, 12 categories, and 4 clusters.
1. Focus on the Individual User
- Goal setting and goal striving
- Motivation
- Routines
- Lack of awareness or knowledge
2. Focus on the Technology
- App features
- Usability of the app or food database
- Technical issues
- Data security, accuracy/trustworthiness
- Costs
3. Focus on Positive and Negative Outcomes of Nutrition App Use
4. Interactions between the User and their Social Environment.
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