woocommerce-mailchimp | Simple and flexible Mailchimp integration | Ecommerce library

Heyyo,

So I'm currently maintaining/further developing a Wordpress-based website, which uses WooCommerce to handle orders. The system works by the customer purchasing monthly subscriptions to receive help in various matters, and at the end of the subscription, we'd like to notify the user by email that the subscription has ended (which is currently the issue at hand).

I've had a look at MailChimp for WooCommerce-plugin(s), but quickly realised that'd make it difficult to make sure the customers receive an email a month after their purchase, and not just at the start of each month. Furthermore, I've had a look at the WooCommerce-query documentation, which makes it seem possible to make a custom function, get each and every completed order, check if the current date is one month after the purchase, and run PHP's mail() function. But I've not given it too much thought and rather just kept it as "an idea".

And as such, I am here. If anyone have any suggestions or ideas, it'd be well appreciated!