Exit light, enter night

We learnt nothing from the fitness- devices craze. Now, tech is trying to hack sleep. Here's why tracking every toss and turn is not the answer

- Sneha Krishnan

Did we sleep though the alarm? It must have sounded when tech first came for our health choices. We tracked everything: Calories, steps, resting heart rate, metabolism, breathing patterns, water intake. It all helped... until it didn't. Turns out, we need discipline, not data, to stay healthy.

And here's tech again, coming for our sleep. The battle for eight hours of proper shuteye has a leaderboard of its own. Smart rings are tracking REM cycles. There are AI-enabled mattresses and pillows that adjust themselves for perfect alignment. Spotify has playlists for white noise, whale sounds and music that gets more downtempo with every track, to lull you into stupor.