Connect iBBQ-4t to several phones

I bought two iBBQ-4t thermometers for our restaurant.
As we have several chefs who are responsible for cooking we need to add the app to a few different phones.
Does anyone know if this is possible?
As of now we can only pair one phone and no others seem to be able to pair unless I completely disconnect from the paired phone.

Please share the device by adding family members.
Please refer to: