The Sound Level Checker is a free Android app developed by 株式会社よつば鑑定. It falls under the Utilities & Tools category and provides a unique function of automatically showing the result with a three-grade evaluation: "soundless", "normal", or "annoying". Unlike other general sound level apps that only measure noise, this app helps users assess the noise levels in their surroundings.

With the Sound Level Checker, users can easily check the noise of their house, which can be useful for housing improvement and the selection of a new house. The app provides a simple and straightforward way to evaluate noise levels and determine if any actions need to be taken to reduce or eliminate noise.

Please note that this is the free version of the app, so some functions may be limited. Nevertheless, it still offers valuable features for those looking to assess noise levels for housing purposes.