You can watch the movie Conclave streaming on Amazon Prime Video, including the ad-supported version, both in the US and the UK. It is available for free with a Prime subscription. Additionally, you can rent or buy Conclave digitally on platforms such as Apple TV, Amazon Video, Fandango At Home, Microsoft Store, YouTube, Google Play, and Sky Store. Rental prices are around $5.99 and purchase prices about $19.99

. The film is not available on Netflix but is accessible on Peacock with a subscription, though Prime Video is the primary streaming platform for this title

. In summary, the best and most straightforward way to watch Conclave is via Amazon Prime Video, either included with your subscription or by renting or purchasing it on various digital platforms.