I don't think it's possible to find if you have any phone tracking app installed.
I know that many parents use these apps to keep an eye on their kids, and also even employers do that to track their worker's productivity.
Although, if for example, you have an iPhone, you can go to a website that provides this kind of software like https://www.mspy.com and study their options. Maybe there are some common features that, for example, are hard to notice for children but that you can spot easily.
If you think someone spying on you, it will be rather someone who has an access to your phone. Your parent or your partner or maybe your boss.
And of course, Google spies oneveryone, though.
