itsdrnoob/DataMonitor ? reverse-engineered prompt

Build me an Android app that helps people keep an eye on their internet usage in one place. I want it to show daily data usage, app by app usage, weekly and monthly summaries, and separate stats for mobile data and Wi Fi. It should also show live network speed, app usage time, and include a simple network diagnostics section.

Please make it feel lightweight and easy to use, with a clean home screen and useful widgets or notifications for quick checking. I’d like a data usage alert feature too, plus a way to set a custom reset time for mobile data tracking. No ads or paid features, and it should work well offline with a focus on clear charts and simple summaries.

Use current Android best practices, and if you need anything unclear, look up the latest docs online before you build it.