Barometer Altimeter is a free iPhone application developed by Wataru Namiki. It falls under the Lifestyle category and specifically the Weather subcategory. This app allows users to easily check barometric pressure and altitude on their device using the built-in barometric pressure sensor. With a simple and sophisticated user interface, Barometer Altimeter provides various measurable information such as barometric pressure, altitude (absolute and relative), GPS altitude, and hierarchical estimation.

One of the key features of Barometer Altimeter is its offline usability. Users can access the app's functionalities even without an internet connection, making it convenient for outdoor activities or when traveling to remote areas. Additionally, the app supports automatic measurement in the background, allowing users to continue using their device for other tasks while still monitoring the barometric pressure and altitude.

For those interested in tracking changes over time, Barometer Altimeter offers a barometric pressure history feature. This allows users to view the historical data and observe trends or patterns in the atmospheric pressure. The app also supports dark mode, providing a visually pleasing experience in low-light environments.

Furthermore, Barometer Altimeter extends its compatibility to Apple Watch, enabling users to conveniently access the app's features and information directly from their wrist.

Please note that for any requests or inquiries, users are advised to contact the developer through the provided support URL.