With the correct use of the gadgets, you will definitely lose weight. However, buying a fitness watch is not enough to lose weight healthily. The best thing to do is to contact a nutritionist and / or training coach. In general, if you train in the correct heart rate range, you will burn fat. If you are a beginner and want to buy a sports watch, we recommend that you take a performance test beforehand. So you can find out which heart rate range is the best for you This is the only way you can burn fat and lose weight more easily.