Our App used to have a rating of four stars. The same day our only competition lowered his price we got hit with five one star reviews. Instantly our App fell like a rock and we went from 150 sales per day to only 15. Now that we released our update our is back into the top 100 and in the same area as it was before (but not the same sales) We have had five, five star reviews since we updated but our rating has not changed at all. Yesterday I noticed a new five star review and then two hours later it was removed. Now we got hit by two one star reviews, this time they did not even write, they just submitted a blank one star review What's interesting is that we have now passed our competition in ranking and we have started to receive one star reviews once again. Honestly as much as I hate to think it, I feel that our competition is sabotaging our rating. This is not something new as I have read about other devs dealing with this type of thing. It's just sad that someone would stoop so low.