Sushinet
Sushinet · In development — not yet on the App Store
Hide, rename and reorder shipping options. Hide payment methods. Block checkout on postcode, cart total, weight or customer tag — with exemptions. Then watch the rule against your real orders before it changes a single one.
Stops checkout when the address is a PO Box — except when the customer is tagged wholesale.
Written by the rule engine itself — the same engine that is compiled into the checkout Functions, so the sentence and the behaviour come from one source and cannot drift apart.
One rule, one outcome, shown before and after. This is the whole job.
Illustration of the outcome, not a screenshot.
No express delivery to remote postcodes
Hides Express when the postcode is 6770, 0800...0899 or 787*.
Block PO Boxes, except wholesale customers
Stops checkout when the address is a PO Box — except when the customer is tagged wholesale.
No cash on delivery over $300
Hides the Cash on Delivery payment method when the order total is at least 300 USD.
Rules compile into Shopify Functions and run on Shopify's infrastructure. Once published, our server plays no part in a checkout — if we were offline, your checkout would keep enforcing exactly what it already was.
Nothing is injected into your storefront — no script, no pixel, no snippet. The most common way a store app breaks a store is by editing the theme, and there is no version of this app that can.
One live rule on each checkout area, on your real store, with unlimited draft and monitor rules, the preview and the linter included. Not a development-store trial — you can judge it on your own traffic before paying anything.
Yes. One rule can be live on each checkout area — shipping, checkout blocking and payment — on your real, paying store. Unlimited rules in draft and monitor mode, the preview, the activity log and the linter are all included. This matters because "free" in this category often means development stores only, which is no use for deciding whether something works on your actual traffic.
Nothing. Rules are compiled into Shopify Functions and run on Shopify's own infrastructure, so once a rule is published our server is not involved in a checkout at all. If we were offline you would be unable to open the admin and edit rules — your checkout would carry on enforcing exactly what it was already enforcing.
A test mode tells you what happens to an order you construct yourself. Monitor mode records what a rule would have done to the orders your store actually received — "this would have blocked 12 checkouts last week" — while changing nothing. You go live on evidence from your own traffic rather than from a test order.
Shopify caps each Function at roughly 11 million instructions per checkout, and we measured ours: the fixed runtime and parsing overhead is about 2.4 million, or 22% of the budget, before any rule runs. Ruleproof will refuse to activate a rule set that would put a surface near that ceiling, and tells you why, rather than letting you find out at checkout.
Public apps containing Shopify Functions work on all plans. Some individual capabilities are restricted by Shopify itself rather than by us — payment customizations, for example. The app detects your plan and says so on the rule while you are writing it, instead of letting you save something that will never fire.
Sushinet, an independent Shopify studio based in Sydney, Australia. We are deliberately small: we build a short list of apps rather than a wide catalogue, and support is answered by the people who wrote the code — not a ticket queue. Our registered business details are on the privacy policy.
Ruleproof is in development — not yet on the app store. Tell us and we will let you know the day it is installable — or ask us anything before then.
Privacy policy · built by Sushinet