While using the Snapchat application, it is rather impossible to save a snap for later use. This is to day that a snap is deleted soon after your Snapchat followers have viewed it. However, it is now possible for Snapchat users to take a screenshot of the snap they would like to save and then save it for later reference. Even though this may be possible, it is not possible to conceal this from the sender of the snap. This is because the sender will be notified that a screenshot has been taken by a certain user.
If you do not want the sender of the snap to know that you have saved the snap, you may take a picture of the snap being displayed on your screen, using another phone or record a short video of the same, using another phone. This way, you get to save the snap without the knowledge of its sender. Alternatively, you may use other applications that are designed to save snaps from the Snapchat social media platform.