Luma

Get Luma

iOS · Android · watch

Light in the morning.
Dark at night.
That is the whole app.

Luma reads the light you actually get, not the light you meant to get, and moves three things around your day: when you go out, when you stop drinking coffee, and when the house dims.

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4.8 ★ · 21,400 ratings · free for 30 days

Playing itself — touch the phone and it is yours.

Good morning, Salma

You are 40 minutes into today’s light.

62%of daily dose
  • NowStep outside for 20 minutesCloud cover is thin — this is the best light today.
  • 14:30Last coffeeEight hours before your sleep window opens.
  • 21:40Dim the houseLights down to 20%. Luma can do this for you.

Three questions, then it gets out of the way

Onboarding, in full and in order — answer it here. There is no fourth screen.

  1. Where do you wake up? — current
  2. When do you want to be asleep? — to come
  3. Wear it for three days — to come

Where do you wake up?

Location sets sunrise and sunset, and nothing else. Only the coordinates leave the device, rounded to 10 km.

Location

--:--

Choose a city and the day is drawn from it.

Your day in light

Measured at the wrist, in lux, against your target curve.

Morning
on target
Afternoon
−22%
Evening
clean
MTWTFSS
Bars are measurements. The line behind them is the target — no number is invented.Press and hold any hour to see where you were.

Built for one hand, at 7am

  • Everything reachable. Every primary action sits in the bottom third. Settings live behind a long-press, not a hamburger.
  • Spring, not slide. Tab changes settle in 480ms with a small overshoot, so the app feels held rather than driven.
  • Quiet by default. One notification a day, at the moment it can change something. Two if the weather turns.
  • Legible outdoors. Minimum 17pt body, 4.6:1 contrast, and a high-contrast mode that drops the gradients entirely.

The states nobody screenshots

Permission, emptiness and failure, designed on purpose.