I want one page checkout on my store. I have used many free and paid apps but they have low quota. I want a free app with unlimited quota and high customization.
Shopify is going to change to one-page checkout in the future and does offer early access to some merchants. Here’s their page about it: https://help.shopify.com/en/manual/checkout-settings/checkout-extensibility/one-page-checkout
Hope that info helps!