Yes. Ultimate Subscriptions is a companion plugin — WooCommerce Subscriptions still powers the recurring billing. Ultimate Subscriptions adds the self-service actions and merchandising tools on top.
Every feature has its own independent toggle under WooCommerce → Settings → Ultimate Subscriptions. Disabled features register zero hooks and add no front-end code at all.
Yes — it offers subscription plans on any product and replaces both the WooCommerce Subscriptions and APFS product tabs with a single “Subscribe & Save” tab. When you add a product to an existing subscription, matching APFS pricing schemes even carry across.
Self-service actions are gateway-aware: any action a subscription’s gateway can’t support is hidden automatically, so customers are never offered something that would fail.
It declares HPOS and Cart/Checkout Blocks compatibility, is fully object-oriented and PSR-4 autoloaded, uses native date inputs (no jQuery UI), and has no runtime Composer dependencies. Requires PHP 8.1+, WordPress 6.4+, WooCommerce 8.0+.
It adds four custom, independently toggleable emails for skipped subscriptions and next-payment date changes — for both customers and admins.