You can use the myClubs app on one device at a time only.
Your myClubs account is linked to the device on which you first logged in with your access data in the app. For security reasons and to prevent fraud, you can change your device only every 30 days. As soon as you log in to the myClubs app on a new device with your access data, a pop-up will appear informing you about the change of device. After the change, this device is linked to your account.