I tried this app to publish posts to instagram, facebook and pinteres directly from my store. Unfortunately, it does not do this.
What this app is great for, is that you can get a visually appealing 1080 x 1080 px grafik with the product picture.
Features I would pay for: Individual texts, different pictures sizes and aspect ratios, publish to social media with article description attached.
Kind of like later.com firectly from my store.