How to Screenshot a Snapchat pic without the other person knowing?

So have you ever Wanted to screenshot  someone's Snapchat pic without the other person knowing?
Today I will teach you how you can do this with technique,

Just follow the simple steps:

• First of all download any screen recorder, usually screen recorder are for rooted device, but there are plenty of other apps which does not require any root access. 

Such as  1.  FREE screen recorder NO ROOT

             2.  AZ Screen Recorder - No Root

• After you install and start recording simply open your snapchat and hold and view the required snapchat.
• After you stop recording the the screen, simply play the video and click the screenshot of the required snapchat