William Hill US, the North American subsidiary of the UK bookmaker, has launched a new version of its William Hill Mobile Sports app for players in Nevada, with in-play wagering now available for every professional American football game taking place during the 2013 season.

Version 3.0 of the app also introduces a selection of different parlay cards and is available to all iOS and Android customers with an active data plan carried by network operators AT&T, Sprint, Verizon, T-Mobile or Boost Mobile.

The app is restricted to Nevada and requires registration at one of William Hill’s 75 betting venues in the state, where players can also make deposits and withdrawals.

William Hill US chief executive Joe Asher said the company was excited to roll out the upgraded product, which he described as “the best wagering product available to customers in Nevada.”

“Our already popular parlay card offering becomes that much more attractive with its availability from anywhere in the state, and the ability to place InPlay wagers at any point during any pro football game this season should be a hit with every football bettor,” he added.

Shares in William Hill plc (Co. Data) (LSE:WMH) were trading up 0.91 per cent in London Thursday morning at 420.80 pence per share.