To watch the Insidious movies, there are two ways: by release order and chronologically. The release order is as follows:

1. Insidious (2010)
2. Insidious: Chapter 2 (2013)
3. Insidious: Chapter 3 (2015)
4. Insidious: The Last Key (2018)
5. Insidious: The Red Door (2023)

The chronological order is as follows:

1. Insidious: Chapter 3 (2015)
2. Insidious (2010)
3. Insidious: Chapter 2 (2013)
4. Insidious: The Last Key (2018)
5. Insidious: The Red Door (2023)

For The Conjuring movies, there are also two ways to watch them: by release order and chronologically. The release order for The Conjuring Universe is as follows:

1. The Conjuring (2013)
2. The Conjuring 2 (2016)
3. The Nun (2018)
4. Annabelle (2014)
5. Annabelle: Creation (2017)
6. The Curse of La Llorona (2019)
7. Annabelle Comes Home (2019)

The chronological order for The Conjuring Universe is as follows:

1. The Nun (2018)
2. Annabelle: Creation (2017)
3. Annabelle (2014)
4. The Conjuring (2013)
5. Annabelle Comes Home (2019)
6. The Curse of La Llorona (2019)
7. The Conjuring 2 (2016)

Its important to note that the Insidious and The Conjuring franchises are not connected, so they can be watched independently of each other.