You can watch the movie Ready or Not (2019) on several streaming platforms and digital stores:

• Streaming subscription services: Disney+ and Netflix currently offer Ready or Not for streaming

• Streaming on fuboTV is also available

• Digital purchase or rental options include Apple TV, Amazon Video, Google Play, Microsoft Store, and Fandango At Home

• In some regions like New Zealand, it is available on YouTube and Prime Video Store as well

So depending on your location and subscription, you can watch Ready or Not on Disney+, Netflix, fuboTV, or rent/buy it from major digital stores like Apple TV and Amazon Video