Hundreds of apps put snoops to work and then there is "supersonic tone tracking". Of 300 apps Exodus has analysed, Yale says 75 per cent contain trackers.

Privacy is nearly dead, but we're not even close to getting over it. You know the type: the profilers and data harvesters, the location-stealers. Big data empire builders who maintain hundreds of millions of profiles - then leave them around to copy.

When you turn on the setting in your browser that says “Do Not Track”, you probably expect to no longer be tracked on most websites you visit. Right? Well, you would be wrong. But do not worry, you are not alone.