The reason these apps don’t work is that the Instagram API does not share this data with third-party vendors as well, making it near impossible for these third-party app developers to make such features available to customers. At the very least, if you were to download and run these apps, you will get a randomized list of Instagram users who may have nothing to do with your account, and the worst part is, some of these app developers, charge you a sum of money to get these apps, which is again a very unethical thing to do.
In conclusion, all we can tell you is that there is currently no way to check who has visited your Instagram, and it seems like Instagram does not have that feature in the pipeline as well.
