Nike app for self-tying shoe comes undone

Nike's new self-lacing trainer, the Adapt BB, has fallen at the first hurdle after the Android app that controls the shoe malfunctioned.

Billed as the "future of footwear", the $350 (£268) a pair Adapt BB launched on Sunday.

However, an update to the Google Android app that allows wearers to loosen or tighten the trainer failed to work.

Customers complain that the Android app only syncs with one shoe.

The shoe can be controlled manually using two buttons on the side.

But people are frustrated that the Android app fails to work.

One reviewer on Google Apps, Glenn Jeffries, wrote: "The software update had an error and now my right shoe won't charge or turn on!!!! To spend $350 on a pair of shoes and not have it to work is embarrassing."

While Chris Sandoval said: "App wont pair with left shoe. Paired with sneakers right after unboxing then completely crashed after last update."

The Adapt BB contains a small motor which pulls the laces inside the trainer.

Nike claims it has reinvented the shoe lace - which "dates back to 3500 BC, before Stonehenge or the Pyramids" - with its Adapt BB.

Prior to the launch, Nike said: "Shoelaces: you had a good run. But we think we may have finally bettered you."

Nike has been contacted for comment.

College basketball star Zion Williamson fell when his Nike trainer split during a game

It has been a difficult week for the company.

On Wednesday, Zion Williamson, a college basketball star for Duke University in North Carolina, slipped and fell when one of his Nike trainers split apart.

The incident sent Nike's share price down more than 1% in yesterday's trading.