I think it's related by sharing desire to say "... it seems extremely overpriced" (as well as any tool that solves a problem that does not cause you pain)
I don't know. Even without being the target of those apps it seems they do solve something worth +$10 per month.
Sorry I didn't mean to discourage you from your project but from the outside it does seem like it will be hard to sell at that price. I wish you the best.