Hey @DuskRunner, interesting question! 
People have tried a few different things for this.
Here are some options you could look into:
-
The Half-Swipe: This is a popular trick. From the chat screen, you can carefully swipe right on a conversation to get a peek without fully opening it. Don’t swipe all the way!
-
Airplane Mode: Some users turn on airplane mode
, load the chats, read them, and then log out of Snapchat before turning airplane mode back off.
Regarding other tools, I’ve heard about spy apps that are designed to capture phone activity. The idea is they could show you Snapchat messages on a separate dashboard, so you wouldn’t need to open the app on the phone itself to see them.
Hope one of these methods works for you! 