Nembol chose not to be in the Shopify App Store any more. It's good to know that an app does not need to be in the Shopify App Store to be a valid and functional Shopify app.
Shopify offers partners APIs (programming authorizations) to allow selected developers to create apps for Shopify users, and Nembol is of course amongst these selected developers.
In addition, Shopify also offers the option for developers to list their apps in the Shopify App Store.
This is an additional revenue stream for Shopify and Nembol currently does not participate into it, because Nembol works with several other channels, such as eBay, Amazon, Etsy, Storenvy, WooCommerce, PrestaShop, and more, and we have several users coming from channels different from Shopify.
We may of course reconsider this in the future.
So, if you are a Shopify user and wish to publish your Shopify products on eBay, Amazon, Storenvy, Etsy, WooCommerce or on social media, this are the simple steps you should follow:
Create your Nembol Web account on https://app.nembol.com or download and set-up your free Nembol Mobile app
Connect either Nembol Web or Nembol mobile to your Shopify account (Nembol Web and Mobile will share your login authorization, so just pick the one easiest for you)
Start using Nembol for sharing your Shopify products or for publishing on Shopify your listings coming from other channels such as eBay or WooCommerce.
Note that as soon as you set-up your Shopify account in Nembol, you'll see Nembol among your Shopify Apps. As in this screenshot: