Since some days, Instagram allows you to share your pictures not only in square format, but also in landscape and portrait format.
Not all Instagram purists welcome this new feature, but I think it´s great for photographers.
Before the implementation of the new Instatgram landscape and portrait format feature, you had to make a detour over third party apps. Now this is not neccessary anymore. Good news for us, bad news for the app developers.
I have also updated my tutorial "10 Easy Steps How To Use Lightroom CC And Lightroom Mobile To Upload Pictures To Instagram". Have a look!
The official announcement from Instagram: Thinking Outside the Square: Support for Landscape and Portrait Formats on Instagram