What are the best apps for Instagram optimization?

Question

Looking for the best apps that help you connect with a targeted audience, increases your engagement and allows you to collaborate with other creators on Instagram.

Example: A Instagram service exchange. Where you can exchange likes 4 likes, follow 4 follows, comments, tags in stories, etc... by REAL targeted users.

Antonio Bustamante · Accepted Answer

Instagram has been cracking down on apps made to auto-like/follow etc, so a lot of functionality has disappeared from these services. I use Iconosquare, specifically their Influencers product, to do advanced searches on best accounts based on certain demographics. https://pro.iconosquare.com/features/influencer

Matthias Esterl · Answer

We are currently developing an assistant for Instagram. It aims to help you to build an organic follower base of people that care about your topics. Plans are to start a private beta late next month (10/2017). Waiting list sign-up is open on the website now. Feel free to get in touch for more infos..

Pulkit Agrawal · Answer

Latergramme (now just Later) is a pretty sophisticated solution to manage Instagram posting, especially across accounts. It might be more targeted for the business user, but might be worth evaluating in your search!

Alberto Moral · Answer

With InstaMetrics you can see your most valuable users, and discover your engagement

Harsha Halvi · Answer

This tool gives you good analytics as well as sharing ability

Antonio Bustamante · Answer

Same with Crowdfire. A lot of their functionality was capped by Instagram, but some of it is still there, it's useful, and it's a much simpler tool (and cheaper) than Iconosquare.

Gigi Rodgers · Answer

I freakin' love this tool. Looking at when the best time is for me to post my photos/videos will really help me determine the best strategy moving forward. 
They have all the analytics I need and then some.