All user data is safely stored on the Between server and is synced with the Between ID -- it's not saved on your mobile phone or linked to your phone number.
Even if you stop using Between for a long period of time, your data will not be deleted. You just have to login again using your Between ID.
1. Don't create a new ID or discconect wit your partner.
2. Please remember your ID and password. If you forgot your ID you can check it on your partner's app.