If you don't have a bridge yet and have been relying on the Philips Hue Bluetooth App, there is interesting news for you. With the update to version 1.37.0, you can now transfer all paired lamps to the “normal” Philips Hue app with a tap of your finger. This has offered Bluetooth support for some time and should make the separate app superfluous.
Philips Hue: Transferring data from the Bluetooth app Control soon only via the Hue app
Control soon only via the Hue app