Event organisers across the world are losing time and money thanks to inefficient and old-fashioned queues, wristbands, and cash-only bars.

Qpal is using mobile technology to stop that.

Founded by Craig Buchan, its app is aimed at gig-goers and gives time, money and big data insights back to the industry.

See more of our 101 tech start-up disrupters here.

And check out our 101 rising stars of tech - the exciting firms which did not make the main list but have the potential to grow.