About this app
Hello and, again, welcome to the Aperture Science computer-aided enrichment centre. Made for fans of Portal, this app allows you to monitor the current battery level of your device. As you charge your device, the battery level will be announced so you can passively keep track of it. To access settings, tap on the Cake icon. Features: - Portal themed battery level monitor - Battery level announcements: keep track of your battery percentage without looking at your device - Portal soundboard - Siri shortcut to get the battery level - Change the app icon - Switch between dark and light mode (via settings or swipe up/down with 2 fingers) - Battery level announcements works with any language your device is set to Inspired by the Portal game, this battery level monitor is loosely based on the Portal test chamber level signs. Disclaimer: This is a third-party app made by fans of the Portal game, and is not affiliated with or endorsed by Valve Corporation, the Portal brand or Steam.
Latest release
What’s New
- Fix issue where the announcements/soundboard was stopping your music from playing - Hide status bar on main display
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
- First observed Aug 15, 2026 · 3:11 AM Free
Screenshots
