I'm considering buying a Fitbit for my son (aged 12). He doesn't carry a mobile as he prefers using IPAD for games and he isn't into social media a lot. I'm considering a basic fitbit (Inspire range, which is the small fitbit). Do you need to carry a phone whilst using the fitbit? Do you have to have GPS enabled to use the features? Hoping there are some fitbit users on here as I can't seem to find a suitable answer on the Fitbit forum. Thanks in advance!