서울자전거 따릉이 is a dedicated app for the public bicycle system operated by 서울특별시 (Seoul Metropolitan Government). The app allows users to sign up, purchase usage passes, rent and return bicycles, and check rental stations.

The aim of 서울자전거 따릉이 is to promote the use of bicycles as a means of transportation, addressing traffic congestion, air pollution, and the cost of living in Seoul. It is available for individuals aged 13 and above (membership required for 13-year-olds) and operates 24/7.

The app offers various usage passes, including 1-hour and 2-hour passes, as well as weekly, monthly, 6-month, and yearly passes. Users can purchase these passes through the 서울자전거 website or the 서울자전거 따릉이 app, which can be downloaded from smartphone app stores.

To rent a bicycle, users can either enter the bicycle number on the rental screen for LCD-type bicycles or scan the QR code for QR-type bicycles. Safety precautions are emphasized, such as checking the brakes, tires, and chains before riding, wearing safety gear, and following traffic regulations. All 서울자전거 따릉이 bicycles can be returned to any rental station in Seoul.