Hi all - we're happy to let you know we can provide a combined measure of net gained/lost Instagram Followers, as well as historical data for total Followers over time.

Unfortunately Instagram doesn't give agencies historical data solely for Followers Gained, but seeing net "gained and lost" data (combined as one metric) will hopefully help you convey important information to clients.

It's coming soon as a high priority release, and you'll be notified here as soon as it's available.