Spain's antitrust regulator said on Tuesday it was expanding its investigation into possible anti-competitive behaviour by Apple for allegedly imposing unequal commercial conditions on developers of mobile applications sold at its app marketplace.

Spain's antitrust probe into the App Store is expanding in scope to consider if Apple restricts competition between developers using a pricing schedule.

The CNMC’s investigation is assessing price points the iPhone maker sets for apps and in-app purchases in addition to Apple’s business terms for developers.