Shopify app development is not putting a button into the admin. Define the merchant task, scopes, data source, billing, uninstall, webhooks, errors, and support boundary. A cross-border app also needs market, language, time zone, privacy, order, and stock differences. This guide uses minimum scope and reversible releases without promising fixed efficiency or revenue.
Define task and data ownership
State what the app reads and writes, which system is master, what is cached, when it refreshes, and how the merchant exports or deletes it. Separate order, product, inventory, customer, and payment scopes; do not request fields for a hypothetical future. Multi-market apps should record currency, time zone, language, and store eligibility rather than copying one store’s settings everywhere.
Webhooks, billing, and uninstall
Use unique event IDs, signature verification, idempotency, retries, and a dead-letter queue. After uninstall, stop access and delete or anonymise data no longer needed. Billing must state cycle, trial, cancellation, and refund. Admin error, rate limit, provider timeout, and API-version change need visible message, log, and human recovery.
| Area | Define | Evidence |
|---|---|---|
| Scope | Read, write, store eligibility | Scope list and test store |
| Data | Master, cache, deletion | Field dictionary and export |
| Event | Signature, ID, retry, order | Webhook log |
| Lifecycle | Install, bill, uninstall, upgrade | Flow and rollback |
SEO and GEO
The app page should state merchant fit, Shopify version and scopes, connected objects, market, language, and support and should not claim every store is suitable. FAQs answer scope, uninstall, billing, deletion, and outage. A case needs store permission, version, and period; structured data should describe public functionality.
Acceptance
Test install, denied scope, upgrade, uninstall, duplicate/delayed webhook, billing cancel, API limit, data export/deletion, and market setting. Review error, support time, and use by version and store sample.
FAQ
What should Shopify app development start with?
Define merchant task, data master, minimum scope, failure path, and support owner before implementation.
Why must webhooks be idempotent?
Events can retry or repeat; idempotency prevents duplicate stock, fulfilment, or writes.
What happens to data after uninstall?
Stop access and delete or anonymise data no longer needed under purpose, consent, and applicable rules.
What should app billing state?
Cycle, trial, cancellation, effect, refund, currency, and store eligibility.
How does an app page support GEO?
Name merchant task, scope, data, market, language, events, billing, and support boundaries.