An adapter is included

Yes, you can use this controller to fly a DJI Neo manually. The controller supports standard flight modes, but acrobatic or manual flips are not mentioned in the official documentation. For advanced acrobatics, check if the DJI Neo supports such features in its own settings.

The RC-N3 remote control is compatible with smartphones up to 180 mm long, 86 mm wide and 10 mm thick. This means that it can support most modern smartphones, provided they are equipped with the DJI Fly app.