Flic Buttons Integration with or without hub?


I am looking into buying “Flic” buttons to trigger Node Red automations in Home Assistant.
Should I buy it with or without hub? Which one is easier to integrate into HA, resp. is there a difference in features of both methods? What do I need to integrate them without a hub, just a Bluetooth dongle? (which I already have)

Alternatively, do you recommand anything else than Flic for this purpose? I like how Flic can have different methods to press the button and trigger different rhings.

Thank you for your advice!