Each week, getwestlondon writer John Shammas takes you through the must-have apps for your mobile devices.

We love wasting time on YouTube.

Want to watch a trailer for a new movie? Go to YouTube.

Want to watch a compilation of cute cat videos? Go to YouTube.

Want to watch a US Presidential Debate from 2008 that has been auto-tuned for giggles? Yeah, you go to YouTube.

The problem is, streaming YouTube beyond the wonderful world of Wi-Fi is both slow and hits data charges high. It can also be impossible to watch your favourite videos when you have no signal, say on the underground for example.

That is where TubeBox comes in.

This app, priced £0.69, allows you to sync your YouTube account with the app, automatically recognising your channel subscriptions to make it easier to access your desired content.

You can then, when in a Wi-Fi zone, download all the videos you want to watch for free and then watch them while offline after you have headed out the door even, when you're zooming along on the central line underground on the morning commute.

This will revolutionise the way in which you waste your time, and that is Geek Speak's favourite way to spend time.

Ditch the Kindle, or those paper book things you sometimes see old people with, and get watching high definition video content on your phone or tablet whenever, wherever, without getting hit with a bill at the end of it.

TubeBox is available on iPhone and iPad.