Polar's Ignite 2 outperforms its more expensive brother thanks to its sleek, high-quality design. When it comes to sports, the holistic concept from in-depth sleep analysis to individual training recommendations is impressive. However, there is a lack of apps and the touchscreen could be more responsive.

"One wristwatch, one function - that has long been a thing of the past. Beyond telling the time, smartwatches and fitness trackers offer more and more possibilities: Phone, music player, fitness tracker, messaging service - just to name a few. Wristwatches have become powerful computers...