We called the Fitbit Charge 6 "the best fitness tracker" in our review. Praise doesn't get much higher than that, and you can currently pick up this excellent wearable for £103.55. It has a slim and lightweight design with multi-day battery life despite having GPS to track runs even if you don't have your phone with you. Though there's no third party app support, Google-owned Fitbit has added Google Wallet functionality so you can pay with your contactless cards. You also get six months of the Fitbit Premium subscription for free when you buy the Charge 6. Fitbit Charge 6 - NOW £103.55 - SAVE £36.44 SEE THE DEAL HERE