Mobile travel applications have evolved from basic navigation tools into multifunctional “digital travel companions” that influence tourist behaviour before, during, and after travel experiences. This study explores how mobile apps affect user behaviour, travel planning efficiency, decision-making, stress reduction, satisfaction, and on-site engagement. A mixed-methods approach—including 2,450 tourist surveys, mobile analytics, and 30 expert interviews—examines key behavioural patterns across international travelers in Europe, Asia, and South America.

Findings show that mobile travel apps significantly enhance convenience, reduce uncertainty, support real-time decision-making, and promote destination engagement. However, problems such as digital fatigue, information overload, privacy concerns, and overdependence on apps reduce user satisfaction in some cases. The study highlights the psychological, technological, and cultural drivers that shape app usage behaviour and suggests best practices for future app design.