Battery Level - Portal is an iPhone app developed by An Trinh. This free app is designed for fans of the popular game, Portal, and allows users to monitor the current battery level of their device in a unique and entertaining way.

With Battery Level - Portal, users can passively keep track of their battery percentage as they charge their device. The app announces the battery level, eliminating the need to constantly check the device's screen.

In addition to the battery level monitor, Battery Level - Portal also features a Portal-themed soundboard, allowing users to enjoy the iconic sounds from the game.

The app offers a Siri shortcut to quickly access the battery level, making it even more convenient for users. Users can also customize the app by changing the app icon and switching between dark and light mode.

Please note that Battery Level - Portal is a third-party app developed by fans of the Portal game and is not affiliated with or endorsed by Valve Corporation, the Portal brand, or Steam.