Leon here from Shopify Support.
I'm not entirely sure which options you've tried so far, but the Shopify App Store does include a few free and lower-priced options for adding shoppable Instagram.
Instagram Shop by Snapppt is a free option, while Shoppable Instagram Galleries offer an option for under $10 per month. You can find all the options for Instagram integrations in the Shopify App Store.
I learnt that Shopify has allow direct integration to Instagram starting March this year.
Do you have any good reference on installing the shoppable in Shopify/Instagram?
Thanks & Best Regards,
Elle here from Shopify.
To start selling on Instagram, you'll simply need to install the Instagram sales channel in your admin. There is no app needed for the integration! Head to Settings > Sales Channels > Add Sales Channel > Instagram to add the channel.
There are a few requirements for the channel which you can read more about here.
For a step by step guide to setting up the channel you can refer to this guide here. It's very straightforward!
Hope this is helpful! Feel free to reach out to our support if you have any other questions! We're available 24/7.