URC8810: Can I pair the Smart Zapper with a tablet and a phone at the same time?

No. Due to the way Bluetooth Low Energy works, it is only possible to pair with either a tablet or a phone, not both simultaneously. If you have the Nevo app installed on a tablet and a phone and wish to change control from one to the other, you must run the pairing process again.  It is not necessary to reprogram any devices or activities again.