It is important to check your engagement on Instagram. It not only helps you to gain more followers but also helps you to understand your followers which helps with a great deal when you start selling.
Phlanx is one of the best and easiest tools to measure your Instagram engagement. This offers 10 free checks a day.
The site also offers trails and if you are an agency or looking for an in-depth analysis you could buy a subscription.
The website has three plans $25, $35, and $50 a month. You could start your trail on any plan
Tanke is another good tool to get the engagement factor. One of the good things about the site is it offers a chrome extension. With this feature you could literally check the engagement factor on the webpage.
Mighty scout is another good tool. It also displays the top mentions.
One of the interesting features is, it helps you to find and track Instagram influencers.