Yes, you can use an outdoor or an indoor aerial to receive live Freeview channels available at your location. If you do not have an outdoor aerial, our partners NetGem recommend the below indoor aerial with your device:
Please note, the above aerial is not required - merely recommended. There are several (cheaper) alternatives on Amazon and other trusted seller sites.
An aerial is required to watch both live and digital terrestrial channels (e.g. BBC One, BBC Two). But worry not, there is plenty of content available without the requirement for an aerial, such as: HD channels and applications like Prime Video, Rakuten and YouTube.