We all encounter technological advances that make us ask ourselves, why does this exist? For example, there’s an app called “Nothing,” and there’s nothing, indeed — you just see a black screen whenever you open it. The weird thing is, it has been downloaded more than a million times. Luckily, there are still apps and gadgets developed all the time that actually make our lives easier.

1. A smart sleeper that uses white noise and adaptive rocking to soothe the baby and help with falling asleep

2. A sensor for quick testing of the quality, calorie count, and freshness of food and liquids.

3. A pocket washing machine: it uses ultrasonic waves to clean the clothes delicately.

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