Get the biggest stories sent straight to your inbox Sign up for regular updates and breaking news from WalesOnline Thank you for subscribing We have more newsletters Show me See our privacy notice Invalid Email

A teenager has invented an app to stop people sleeping through their Tube stops – even though he’s only ever been to London as a visitor.

Even though A-level student Dafydd Jones lives 170 miles away from London in Tonyrefail the 16-year-old whizz has come up with a way to wake commuters near their stops.

His idea was prompted after his brother Lloyd, 24, moved to London – and fell asleep on the Underground at the end of the day.

Clever Dafydd came up with an app to use wifi hotspots at Tube stations to wake passengers up with an alarm just before they’ve reached their stop.

The Merthyr College student said: “Not long after my brother moved to London he fell asleep on the last train of the night and ended up at the end of the line.

“In order to get home he had to pay a fortune for a taxi.

“When he told me that I just thought there had to be a better way. It must happen to loads of people.”

Dafydd designed the app, called Doze, despite having only been on a couple of family visits to London.

The location-based alarm app could not function using standard GPS connectivity because of the Underground network.

Instead it makes use of specific existing wifi hotspots located at more than 250 stations.

The app is triggered when it arrives at a station – and will set off an alarm waking you to get off before the train pulls off.

(Image: Dominic Lipinski/PA Wire)

Business student Dafydd, who has been given support from Big Ideas Wales, part of the Welsh Government’s Youth Entrepreneurship Service, is set to see his app launched on the London Underground later this year.

And he said he hopes if it is successful it could be used on transport networks across the world.

He said: “I’ve never lived in London or spent more than a few days there but can’t wait to go and try the app out for myself.”