Have to leave the app running in the background of your phone ALL THE TIME. Drains battery. If you go on holiday you need to let them know because of the app not working- ridiculous. If your phone dies because the running app has drained your battery, or decide to put it on aeroplane mode to save battery, you could risk them cancelling your insurance policy because the app 'needs' the app on. I went with Carrot because they were £300 cheaper but now I really wish I'd have just spent the extra money to not deal with this hassle. They need to sort out the black box so it doesn't have to be connected to your phone. The customer service is good on Live Chat I just really don't like how the insurance policy works.