Which iOS app should I use for booking and managing flights on a budget airline?

Allegiant is the official iOS application for the low-cost carrier of the same name, designed specifically for customers who fly its route network. The app is primarily useful for travelers seeking to book Allegiant's point-to-point flights, which often serve smaller regional airports. A key feature is the ability to search for and secure the airline's trademark non-stop routes at advertised low base fares. Once a booking is made, the app functions as a mobile hub for the trip, enabling check-in, seat selection, and boarding pass storage. For managing existing plans, users can view itineraries and make changes, though some complex modifications may still require a call to customer service. Reviews indicate that users appreciate the app's straightforward design for completing these core tasks, with several mentioning its simplicity and reliable performance for basic flight management. However, the overall app rating is relatively modest, suggesting experiences can vary. The app's utility is inherently tied to the airline's specific service model and route map, so its value is highest for passengers who frequently travel on Allegiant-operated flights or from cities it serves. While the in-app experience for booking is generally positive, some customer service interactions, such as lengthy phone waits mentioned in feedback, fall outside the app's purview.