Every store eventually hits the same checkout problem. Cash on Delivery should not appear on a $400 order. The manual bank transfer option is named something only the finance team understands. The shipping rate you actually want people to pick sits third in the list.
Shopify does not let you do any of that from settings, and the usual answer is two apps: one for payment methods, one for shipping. Two subscriptions, two rule builders, two places to look when something goes wrong.
HideKit does both from one rule list. A rule is an action (hide, rename, reorder), the methods it matches, and conditions. Fifteen condition types exist in the engine: country, cart total, product, customer tag, collection, province, ZIP prefix, PO Box detection, currency, cart weight, customer lifetime spend, order count, B2B company, whether a discount applied, and total discount amount.
The part merchants notice on day two is the Rule Tester. Type a cart — Korea, $120, one product — and see which rules fire and which methods survive. Same engine as checkout, proven by 17 parity tests that run the TypeScript engine and the compiled wasm against identical fixtures.
The honest limit: on non-Plus stores Shopify will not let any app hide the Shopify Payments gateway itself, only individual methods like COD or manual payments. The onboarding screen says so before you subscribe.