Thank you for your post. I have already made research to find the best apps to hack Instagram accounts to read the messages. I have found the list of Instagram Spy apps that are good to use to ee what your children write and what messages they get if you worry about the people around them and their influence on your children. I am going to try Spyzie and FlexiSpy apps for iPhone. The last one is used not only for monitoring Instagram but for other apps as well and it is easy to install and set up as I've read. You can read about these two apps if you are interested.