When posting to an Instagram personal page through the Promorepublic app, the caption that you created on the desktop, is automatically copied as soon as you click on the Post button in the PromoRepublic app.
When you're done with editing, on the final stage tap and hold the text box, then just Paste the caption.
And here it is! Now feel free to click the blue tick and the post will be live.
If you have any further questions, please contact us at [email protected].