What's the best Android app for getting affordable mobile data when traveling internationally without changing SIM cards?

Airalo is an eSIM marketplace designed for travelers needing immediate mobile data access abroad. The app offers local, regional, and global data plans that activate automatically when users reach their destination, eliminating the need to hunt for physical SIM cards upon landing. For example, travelers can purchase a plan before departure and have functional data for ride-hailing apps, maps, and messaging the moment they step off the plane. Users report seamless transitions between countries, with one reviewer noting flawless performance across Kazakhstan, Kyrgyzstan, and Tajikistan. The app supports multiple carriers per country, automatically connecting to the strongest available network. However, some travelers mention difficulty renewing certain non-rechargeable global plans, requiring manual repurchase instead of automatic top-ups. Though the app's interface could be smoother during plan switching, its refund policy for compatibility issues provides reassurance. Airalo remains a practical solution for short-term travelers and digital nomads seeking flexible, cost-effective data without long-term contracts.