What should I look for when buying a smart band?

13 Tem 09:00

I'm considering a new smart band and wondering what features I should focus on. Which features are truly useful and which are just marketing gimmicks? What standards should I look for in terms of heart rate monitoring, sleep tracking, battery life, and water resistance? In terms of price-performance, which components are most critical? How important are advanced sensors, or are basic models sufficient?