Snapchat was originally created so that one can send snapchats for a certain amount of seconds. With these apps that allow people to screenshot without the other person getting a notification, it could be an invasion of privacy due to the fact people send snaps with a certain amount of seconds for a reason. With these apps that allow people to screenshot without the other person getting a notification, it could lead to things like blackmail and it only sets people up for breaking trust. It also encourages awful people to start pages on Instagram that expose women/men for sending photos to one another which could then ruin any opportunity for one to get a job or get into college. Snapchat has a 10 second time max for a reason, it should be kept that way and there should be no apps to interfere with that.