... The app is clearly and sensibly designed. It helps to understand the values and gives suggestions for improvement. The price of the Sleep Analyzer is 129.95 euros, the app is free.

The technology seems to be very well thought out and works so inconspicuously that one almost dreams of sleep disorders, so that the mat, which costs 130 euros, is worth it. For all those who suspect that their sleep is not the best, the mat offers interesting insights for further treatment.

First things first: Nokia Sleep was quite convincing as a sleep tracker; the sleep index value corresponded to the impression we had of the previous night. However, Nokia should revise the app. We missed a function that automatically calculates the ideal time to wake the user up...

There are days when you wake up feeling tired, but you don't know why. A simple activity tracker can be informative and show how the individual sleep phases are made up. But wearing wristbands at night, which usually have to be told when you fall asleep, is not everyone's cup of tea...

The bottom line is that Nokia Sleep is a practical, unobtrusive gadget for anyone who wants to keep healthy and fit by improving the quality of their sleep - and perhaps doesn't like to wear a wristband at night. Compared to an activity tracker, the smart sleep mat also has some advantages: it not only collects sleep data, but also evaluates it and gives tips on how to sleep better...