Saving money and lowering carbon —
it holds both.
Two motivations, side by side. The app shows both and lets you choose.
Works everywhere, immediately.
Needs only your location and which appliances you have. Today’s grid as a clean / cheap timeline, with plain nudges.
A quiet diagnosis of your home.
Import your own usage and it reads it the way a good electrician would — entirely on-device.
Why no one shows you this
Utility apps graph what you used. Market-price apps ignore carbon. Carbon trackers use last year's average. Each shows a piece — usugurai puts your real usage on the live grid: carbon and price, through the day.
Real numbers, right now — not marketing.
The very data the app runs on — carbon and price for every Japanese grid area, straight from JEPX and the regional operators. Check it against the source yourself.
As of
6/15 23:00 JST ·
direct from JEPX & the regional TSOs, refreshed through the day.
≈ carbon estimated where a region publishes no live fuel split (Kyushu).
Nothing leaves your phone.
Your location, your appliances, your imported usage — analysed on-device. No account required, no upload, no exceptions. Privacy is the product, not a setting.