A friend of mine was wondering how to share a post to on Instagram. When I first got on IG, I too was confused as to how to re-post for Instagram like I share a post on Facebook. Interestingly this is not a native feature to the Instagram app. You can send a post to someone through direct messaging but you cannot actually share another users post to your own feed as an ‘out of the box’ feature. However this is achievable with another app called Regrann. You will need to go to the app store and download the free Regrann app (by JeredCo) to your phone. Once you have downloaded the app and open it up, there are easy instructions for sharing a post on Instagram.
There you go, now you have it! Use the Regrann App aka Repost for Instagram.