Intercontinental, Shangri-La, and W Hotels all recognize the importance of mobile apps in connecting with customers. Shangri-La's app allows users to book rooms, access travel tips and promotions, manage membership accounts, and get 24/7 support. W Hotels' app lets customers explore hotels, make reservations, and shop online. Shangri-La is highlighted as having the best mobile app for being feature-rich, cross-device compatible, and focused on delivering special offers and services to customers on-the-go.