Dating app Tinder has promised to explain to its users why they pay different rates in the European Union for the same service, the European Commission announced on Thursday, AFP reported.

The commission said it opened an investigation in July 2022 following complaints from Sweden and the Netherlands.

Consumer protection authorities in these countries found that “Tinder applies personalized pricing without informing consumers, which is contrary to EU consumer protection legislation,” the Commission said.

A 2022 study in Sweden found that Tinder applied 36 different prices, with some users paying the equivalent of three dollars and others having to pay up to $36 for the same service.

And until April 2022, younger users were often offered a premium service, while older users had to pay higher rates.

Following discussions with the European Commission following the launch of the investigation, Tinder has promised to clearly inform its users by mid-April if it will introduce different rates based on age.

California-based Tinder is a subsidiary of Texas-based Match Group, which also includes other global dating sites such as Hinge, Meetic, OKCupid and Plenty of Fish.

Match Group claims that Tinder has about ten million paying users worldwide, but that number is steadily declining.