If you want to add subscriptions to your shopify you will need to be able to understand coding. I contacted help desk and they couldn't help me so I just used the paypal subscription button. Works so much easier
The Funny Store
It looks good but it doesn't allow multiple file download.
Un Lieu De Lumiere
The support was for me a horrible experience. Never had the correct answers to my questions.
Moreover if you have apps like receiptful already installed this will be complicated to setup.