Ramme is a tool created for macOS app. It has a feature called Direct Messaging Feature. Sometimes it's called Unofficial Instagram Desktop App. v4 is in development. Now we can use v3.
Direct Message for Instagram will be done through this API, that doesn’t try to be anything it’s not. Log in with your Instagram account to have the app pull up your direct messages in a UI that looks nearly identical to Instagram’s official app. Click a conversation to view images and messages sent to you, plus write your own message, attach photos or send a heart. You can also compose new messages from scratch.
The Instagram desktop methods below fall into 4 groups:
Schedulers that let you set up your posts and automatically publish for you.
Schedulers that let you set up your posts and send you a reminder on your phone.
Schedulers that set up your posts and then post for you via mobile devices or emulators.
Emulators that allow you to post right on your desktop.
Of these, the first group is definitely sanctioned by Instagram because they’re approved partners. Click to jump here.
The second group should be OK with Instagram because you do the actual posting from your own device. Click to jump here.
The third group is not sanctioned by Instagram and could possibly get your account closed – though three of them have told me it’s never happened.
The fourth group might be okay with Instagram. I can’t guarantee it, though.