GeoFinder Advertised a $1 Service but Charged an Extra $37

There is an app called GeoFinder that advertises that users can track their children’s or loved ones’ locations and check whether they are in safe places for a fee of $1. However, without our knowledge or consent, the company signs us up for a monthly subscription and charges an additional $37 to our card without sending any warning, notification, or confirmation request. We receive an email about the transaction a day after the charge appears to have been made. The charge appears on our credit card statement under the name UMobix.com.