What's the best Android app for creating a mobile hotspot without a carrier plan?

Portable WiFi is an Android application that allows users to set up a mobile hotspot even if their cellular plan does not include tethering capabilities. This is particularly useful for scenarios like migrating data between devices, such as transferring WeChat messages, which often require both devices to be on the same network to avoid errors. The app features a simple, one-tap activation process, customizable network names and passwords, and broad compatibility with various Android versions and devices. Users report that it effectively bypasses carrier restrictions where default phone settings fall short, making it a reliable tool for emergency connectivity or specific app needs. However, its performance can vary depending on the device model and carrier policies, and it may not work seamlessly in all regions or on older Android versions. Despite these limitations, the app's high user ratings and positive feedback highlight its value for those needing flexible internet sharing without additional costs.