The BBC has launched a ‘Play-along’ app for its Antiques Roadshow TV show. Available on iPhone, iPad and Android, it gets viewers to test their own valuation skills while watching the programme.

The app takes the form of a multiple-choice quiz that synchronises with the live broadcast or time-shifted shows.

“Wait for the first item to appear in the programme and simply choose one of the four potential values. Be sure to make your choice before the expert gives their valuation and the clock runs out,” explains its app store listing.

Players are given a total score and ranking at the end of each show, grading them as a Novice, Enthusiast, Connoisseur or Expert. The app’s launch follows a similar red-button interactive TV game, which launched last September and has been used by more than 1.5m viewers.

“We wanted our first live and synchronous companion experience to appeal to a mainstream audience and create a real event in the living room for families across the UK,” says head of IPTV and TV Online Victoria Jaye. “The Antiques Roadshow mobile app does just that.”

The app synchronises with the show by picking up inaudible signals broadcast in the Antiques Roadshow’s soundtrack. It’ll work with this weekend’s broadcast on 6 January, or with last week’s episode on the BBC iPlayer catch-up service.

Here’s the iPhone/iPad download link for the free app, and here’s the Android link.