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Brownout

Bitz

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About this app

"Brownout" is an iOS app that lets you easily check the electricity demand forecast (Denki Yoho) for 10 regions across Japan. View each region's actual demand, forecast, and supply capacity as a daily line chart. Simply switch between regions to instantly check the power situation anywhere from Hokkaido to Okinawa. [Features] • Displays electricity demand forecasts for all 10 regions of Japan • View actual demand, forecast, and supply capacity in easy-to-read line charts • Shows real-time usage rate • Region switching [Supported Regions] Hokkaido / Tohoku / Tokyo / Chubu / Hokuriku / Kansai / Chugoku / Shikoku / Kyushu / Okinawa Data is fetched from the Denki Yoho CSV files published by each regional power company.

What's new

Version 2.0.1 · Jul 6, 2026

Fixed an issue where power demand data could not be retrieved for some regions.

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