Hyde here from Shopify. Ah, SEO, that old chestnut!
While I'm not personally familiar with those apps, they do seem pretty popular. I can give you a few free options to help drive traffic to your store. The first thing is to get acquainted with SEO good practices. Here is a really helpful guide on how to get started with this. I also have more general information on that here. I have a few more steps that you can take for good SEO below:
Of course with SEO, Content is King. So consider the resources below:
You'll want to create original and innovative content to capture your customers. Two ways to do this are:
Here’s how you can look up keywords to help boost your site’s ranking.
Another resource that I would hugely recommend is an app called KIT. KIT is a virtual employee for your Shopify store. It helps drive sales by doing everything from creating highly-targeted Facebook ad campaigns, to sending personal thank-you emails to customers, to handling the other apps that you use to manage your store. I really think this is something that would be beneficial for you, and your store as a way to increase your traffic. You can check it out here.
I hope that all helps, but if you have any other questions I'm happy to help.
All the best, Hyde.