The pillbox communicates wirelessly with the app via Bluetooth. If this is not turned on, you will not be able to receive correct reminders.
Some people want to turn off their Bluetooth when they say that it drains the battery from their mobile. Bluetooth Low Energy (which is on your mobile if you use Pilloxa) consumes about 90% less battery compared to previous Bluetooth versions and this means an extremely marginal deterioration of the battery.
The Pilloxa app will also prompt you automatically to turn on your Bluetooth