New Tinder app charging more for those 30 or older

The popular dating app Tinder is making some changes and courting controversy in the process.

Today the company launched Tinder Plus, and it's got some complaining about ageism.

The new features of the premium service allow users to undo swipes, change locations and have unlimited likes.

And while those are all features users have been asking for, this one is not.

In the U.S., the new service has two different pricing tiers, $9.99 a month for users under 30, and $19.99 a month for anyone 30 or over.

European users of the new service will have slightly different pricing tiers - $3.99 a month for users under 28, and $14.99 a month for anyone 29 and up.

Tinder has not explained why it's charging older people more for the same service.