UKIE CEO Jo Twist said the digital ratings system is being "extended" and hopes that PEGI will be used as the single rating system for all platforms, including Apple's iOS.
"I think there is a challenge in terms of the many different devices and platforms and the way in which people are playing games," she said.
"A lot of games that you still buy in a shop that have a PEGI rating, or buy online or download online, have got the PEGI rating, or those that have an online extension, which would be rated under the same system.
"Apple has their own approval system and it would be great if PEGI became the single system for all platforms one day."
hen asked how it would be possible for Apple to adopt the system, Twist replied: "I think it's making sure we communicate that it is effective, but it is already effective.
"Now we're in the situation where it's the single, relevant rating for games, then we can start to show how effective it is, how it's good that the industry takes its responsibilities seriously."