Hi Emilio - Shopify Partner here to help! There is no such software that will completely automate something like this. If there were, it would be considered a "black hat" method and would do more damange to your site than any good it will do. Shopify does integrate these two automatic SEO integrations however:
Both of these defaulted parameters should be changed on every page for best SEO practices, as the defaults won't capture what you're truly intending to send as a message to Google. There are however some applications that I would recommend that help give your SEO a boost.
Other than these two, there are no apps or Shopify integrations that will automatically boost your rankings in Google. You'll need to consider more important aspects of SEO such as your backlink profile and having regular, original content for Google to index.
I don't think there is any such app that does this. Even if you should get an app that will do this, it will not generate unique content for your products. Hence you would end up with duplicate content for your products and Google penalizes duplicate contents.
We offer SEO services at SEO Doctor, we write unique meta titles and descriptions for your products.
Need help optimizing your website and products email: grace[at]seodoctorapp.com for details of our packages.
There is no automatic way to improve SEO for your products. You need to improve off-page SEO on your own, such as writing unique content about your products, ask other blog to give a back link.
However our App SEO Product Optimizer can you improve in-page SEO for products. You can do keyword research and fit in these keywords to your products.
We are also adding keyword rank tracking for store very soon.