In KUKU.io you can analyze all posts you publish: not only created in KUKU.io but also in all connected accounts.
It's easy there to learn about:
1) Dynamics: followers, likes, comments, reposts
2) Optimal posting time
3) Perfect quantity of posts per day
4) Which social networks are best for your business
5) All statistics of posts: you can filter them by clicks, engagement rate, likes and etc.
6) Test your content calendar in analytics.
For $9 you can get social media analytics + posting (1500 posts and 10 accounts). It's easy to start from 14-day free trial to test: https://kuku.io/