Thanks for your post. Very useful information. I really found some good ideas. I cna say that there are so many materials nowadays about how to hack a phone that people who are worrying about the data and privacy check their phones each minute to be sure that nobody tracks them. But such apps exist and they are widely used to monitor someone's phone and get your data. If you are interested in this topic I can recommend you to read this article https://celltrackingapps.com/how-to-find-out-someones-snapchat-password/ and continue on their blog. A lot of useful info and reviews of apps.