Amazon is refusing to comply with a request from the Federal Trade Commission to implement stricter controls that would prevent children from making in-app purchases. The FTC is demanding Amazon implement a “consent” model similar to the one Apple conceded to earlier this year, according to a letter Amazon to the FTC Tuesday. Amazon believes it already has implemented effective parental controls consistent with the model the FTC settled on with Apple, and it says it refunded customers who complained of children making in-app purchases without their permission. “In-app purchasing was and remains a new and rapidly evolving segment, and we have consistently improved the customer experience in response to data,” wrote Amazon’s lawyer Andrew DeVore in the letter.