Quantified Self

What is it?

 These sites often work along side physical hardware such as wristbands and smartphones and allow you to monitor personal activities and then generate graphs and other information based off that data. For example these sites might allow you to monitor personal fitness by tracking movement or running distances and then help you set goals and calculate improvements required to meet weight loss goals. They might also be used to log eating or drinking habits and perhaps to monitor sleep patterns. 

Popular sites

Nike Plus

Lose It!

map my fitness

Jawbone

Run Keeper

myFitnesspal

Sleep Cycle

fitbit

Cost

The cost for hardware could be quite large, although apps and sites may be able to run off existing tech you have, such as a smartphone.

Many apps have a small fee although there are also free ones available, the service levels offered can vary and free apps may include adverts and limited functionality. 

Find out more

 The Top 10 Fitness Apps for 2014 - Men's Fitness

5 Great Personal Training Apps to Help You Get Fit Without a Coach - Huffington Post

The five best personal fitness apps - The Telegraph

The 10 Best fitness apps - The Independant

The Best Sleep iPhone & Android Apps of the Year - Healthline

Five Best Sleep Tracking Gadgets or Apps - Lifehacker