Nintendo will end service for Mario Kart Tour on September 29 at 11:00 p.m. PT / September 30 at 2.00 a.m. ET, the company announced.
Mario Kart Tour first launched for iOS and Android on September 25, 2019.
In conjunction with the end of service, the sale of rubies ended starting today. Rubies can be used in the Spotlight Shop, Mii Racing Suit Shop, and Coin Rush until service ends.
All automatic subscription renewals and new subscriptions to the Mario Kart Tour Gold Pass have also stopped. A FAQ concerning how Gold Passes will be handled until service ends is available here.