I bought it "just to know how it is" and I am positively surprised. I think $10 PER COMPETITOR is fricking expensive. And it is. What if you have 20 or 30 competitors? I can do everything Competitors.app does, with other tools combined. But I was getting everything wrong. Let me explain:

1. I'm currently monitoring 2 competitors on Competitors.app. But I have 15! Well, what I'm getting is A LOT of valuable info, it's like having a half stalker-half PI working for me. Now I know one of my competitor's content strategy and I get all the emails the other competitor is sending on his sales funnel (sorry, my English is far from perfect). Can I do that with other tools? Yes: Skenio or Hexowatch + a fake email.

2. I'm getting info of new competitors entering the SERPs: damn, a new company is ranking for my keywords! Who are they? Ok, let's check. Competitors.app does not charge for that, they charge for every competitor you want to individually stalk, not for every competitor that starts ranking on Google.
Can I do that with other tools? Yes, Serpwoo. And actually Serpwoo.

3. A competitor got a new link! I'm going NOW to check what's his linkbuilding strategy is. Can I do that with other tools? Of course, ahrefs does that flawlessly (I bet this guys pays either for ahrefs API or Majestic's).

But you know what? It's a lot of work to use all those tools. Yes, I already pay for them, so technically it's free for me, but here I have ONE dashboard with all the info, one email alert when something important happens and setting everything took like 5-10 minutes.

The only con is that I still don't know what the price is gonna be for me. $10 per competitor as stated on the site? $7? $5? I think the owner doesn't know either and that's understandable, he's still on an early stage. But he has something good on his hands. I believe this can be huge in a few years, if he gets enough traction to sustain the costs. He's paying for good APIs.

PS: the fact that he's not giving free s**t in exchange for "honest reviews" (wink wink) it's a good sign. I like that.
PPS: I don't think he'll ever release a TLD because in the long term that would be unsustainable. So it's better if you stop asking already.

Again, sorry for my broken English.