Hi Product Hunt 👋 I drive a Polestar, and every time I wanted to know whether it had finished charging I had to find my phone, unlock it, open an app and wait for it to wake the car. That is a lot of ceremony for one number. Polaris is that number, in the menu bar. Click it and you get the whole picture: battery, range, charging state and time-to-full, the charger's live power and whether it's AC or DC, odometer, service interval, and a studio render of your exact car. It refreshes every five minutes, or every minute once you plug in. Three things I decided early and don't regret: - Native AppKit, not Electron. The whole app is one small signed binary, and it idles at nothing. - No backend. There is no Polaris server – your Mac talks to Polestar's own API with OAuth2/PKCE, your password and session live in the macOS Keychain, and there are no analytics or trackers anywhere. - Notifications only when something changed: charging started, charging complete, charger fault. Each is its own switch, and nothing else ever pings you. The two things that took longest were not the ones I expected. Charging power and AC/DC aren't in the GraphQL API at all, so that reads from the gRPC battery service underneath it. And the desktop widget turned into a lesson in code signing: WidgetKit only registers a sandboxed extension, and macOS only honours an App Group container for a build signed with a real team – so an ad-hoc build gets handed a container it is then denied every read from. It's free, MIT licensed. Happy to answer anything – and if you have a Polestar and something reads wrong, tell me which model and year and I'll fix it.

Polaris

Battery, range and charging status — always one glance away

Battery, range and charging status — always one glance away