G-CPU is a profitable cross-platform (iOS + Android) hardware information and diagnostics app built on a single Flutter codebase. The app has surpassed 3.5 million installs and is on track to reach 5 million. It currently generates approximately $17,000 in annual net revenue, excluding in-app purchases, and is available on both the App Store and Google Play in 14 languages. The app provides detailed hardware information, complete device diagnostics, battery and thermal monitoring, network speed testing, device comparison, home-screen widgets, and PDF device reports. It supports hundreds of Android chipsets (Snapdragon, MediaTek, Exynos, Tensor, Unisoc, and Kirin) as well as the complete Apple A/M-series and iPhone lineup. The business has significant upside. Advertising revenue currently comes exclusively from AdMob, with no mediation platforms such as Meta Audience Network, AppLovin, or Unity LevelPlay integrated. In addition, the app is currently serving only around 25% of available ad requests, meaning substantial revenue growth can be achieved simply by increasing fill rates and adding mediation. Additional upside also exists through expanding in-app purchases or introducing subscription features across the existing user base.