This app checks your iPhone for security leaks, tells what to do if hacked1
Enter iVerify, a convenient one-stop-shop for everything you are looking for in terms of privacy and security on your phone. The app not only scans your phone and tells you about ongoing or potential vulnerabilities on a system level, but it also offers advice on how to plug the leaks and secure your device further.
In any case, if you are worried that your phone might have been hacked or compromised, give iVerify a go, it's worth the three bucks price for individuals, and there is an Enterprise version, too. Unfortunately, the "i" in the name for now means that there is still no Android version, but the team behind iVerify is working on that.