Hi Ybba,
With instaplus you can follow your competitors followers. You can comment on posts based on locations. hashtags, userlists, and competitor's followers.
However, you can't comment based on a combination of those; I think this is a limiting factor. And, yep, you can schedule instagram posts.
I think my favorite feature is that I can choose my competitor's followers and then then say for 200 users, perform 2 actions. This means there will be a total of 400 actions. So, sometimes liking a user's posts can be an effective way to get them to follow you back.