This is exactly the reason that I wrote my post about applications being researched based vs. actually researched themselves. Also, that the apps do what they state that they do. This also reminds me of when I was researching different assessments in college.
I know that this comment is a few weeks after you posted this, but I agree that it is important to question each and every app, or product for that matter. Also, I do agree that it is unprofessional for a company or anyone in it to rate an app/product/write a product review on another site (unless it is an interview or information release) no matter what business you are in, especially if that brings your rating percentage up. That would be like if a CEO wrote a review and had each of its employees write a positive review as well – misleading. It is hard to do what you did, but I agree that it is definitely something to think about. I actually did see the reviews on iTunes right after I read your post and I wonder how many other companies have done this on iTunes, Amazon, and other places.
We ended up having a big discussion about apps/research on SLPs Talk Apps on Facebook. A lot was brought up about how we have all been trained in evidence based practice and how apps are tools just like any other product and we need to make the decisions ourselves. The problem is, how can we make that decision when the apps are pricey, the product previews are only 3-4 slides, and we have to go off of what the developer has stated in the information (and some really do have good intentions, not that I know for sure that anyone had bad ones).
Anyhow, good luck with everything in the future and I look forward to continuing to read your blog!