I have used Competitors App in the past two years and I found it really helpful, especially since we are a start-up in a very competitive space we knew we had to somehow keep tabs on them.
There was so much work to do and I knew the competitors already tested a lot of tactics already and with Competitors App I got to be much more informed on their moves. I got some very good ideas from Competitors App due to their great email reporting, it takes very little time to read and it's easy to understand. It was especially helpful since it monitored so many channels.
Must have for us!