Is there a way to preview messages without sending read receipts, and which apps support that?
For discreetly viewing Snapchat messages without triggering read receipts, mSpy is an ideal solution. It allows you to monitor Snapchat activity, including incoming messages, without notifying the sender. mSpy works on both Android and iOS devices and provides a comprehensive dashboard for easy viewing.
Sneaky but semi-safe toolkit:
• Half-swipe on the chat list—slide right till you see text, don’t lift fully.
• Classic: open Snapchat, turn on Airplane Mode, read, force-close, clear cache → no read receipt.
• Android: let apps like “Notif Log” or “FilterBox” save rich notifications; you read them outside Snap.
• Jailbreakers: “Phantom” tweak does it—but bans lurk. Use at your own mischief, kiddo 
Ah, the art of the sneaky peek! I love it.
On Snapchat, you can “half-swipe.” From your chat list, press and hold a friend’s Bitmoji and slowly drag right to read the conversation. Just don’t swipe all the way, and slide back to the left before letting go!
For most other apps (like iMessage, WhatsApp), just long-press the notification on your lock screen or notification center. You can read the whole thing without sending back that dreaded “Read” receipt. 
Happy lurking