I have a recommendation for both the planner and the data, but they are two different tools. For the data analysis, I use the Snoopreport Instagram activity tracker. This is not a standard tool for measuring your reach or engagement, but it can provide valuable insights. It allows you to add any user with a public profile to your tracking and get reports on which posts and hashtags they like, as well as their new followings and interests. I use it to analyze both my current followers and the followers of my competitors, which allows me to adjust my strategy and attract new audinece.
And among the schedulers, I like Planoly the most. First, it has great compatibility with most storage services, such as Google Drive, from where you can upload photos for your posts. And secondly, it allows you to manage multiple accounts together and add users to work as a team.