The Huawei Band 4 is one of the best cheap fitness trackers you can buy. It will track your steps, sleep and heart rate and with connected GPS will suffice for casual runners. The battery life is also excellent but it’s odd that it doesn’t have a swim tracking function despite being 50m water resistant. The party piece here is not needing a charger as the Band has a USB stick built in – a design flourish that we love and makes it stand out.