AMSTERDAM—Apple and Google face a potential class-action lawsuit in the Netherlands over app store charges, after a foundation headed by Dutch entrepreneur Alexander Klöpping began gathering claimants. The action, which still faces legal hurdles before any court hearing, reflects growing criticism over how much the two firms charge developers for payments on their app stores, while the Netherlands has become increasingly popular as a jurisdiction to pursue complaints against multinational firms. Klöpping is a co-founder of Blendle, a digital platform that enables users to buy individual news articles, which he sold in 2020. He told Reuters his determination to pursue the tech giants grew out of his experience at Blendle. “The reason it’s getting so much attention right now is that everyone feels in their gut that there’s this imbalance of power when it comes to big tech companies.” He said while developers have complained most about app store practices, …