Privacy policy

Last updated: 10 November 2026

1. Who we are

Checkout Master is a Shopify app run by Checkout Master, based in Taiwan (“we”, “us”). It adds blocks to your checkout, thank-you, post-purchase and customer account pages, styles your checkout, and hides or renames delivery and payment options.

2. What we get from your store

What we keep:

• Store details. We keep details Shopify shares about your store, such as its name, .myshopify.com address, plan, currency, timezone and country. They include the countries you ship to and your customer account settings. They also include the owner's name and email, your contact email, and the store's address and phone number.
• Staff who open the app. Name, email, language and whether they own the store, so we can sign them in. Changes to blocks and rules are logged under an anonymous Shopify user ID, not a name.
• Your choices, not your catalogue. When you pick a product, shipping option or market for a block or rule, we save that choice. We don't keep a copy of your products.
• Style history. A snapshot each time your checkout style changes, here or in Shopify's checkout editor, so you can go back to an earlier one.
• Upsell results, as daily totals. Orders, units, revenue and cost of goods, per block per day. Never the order itself or anything about the buyer.
• Warnings. When a product is removed or your shipping changes and a block or rule stops working, Shopify tells us so we can warn you. We keep the warning.

A block's analytics tab also lists its upsell orders from the last 60 days. They are fetched from Shopify when you open the tab and are not saved.

3. What you tell us

• What you build. Your blocks, rules and styles. Images go to your own Shopify Files, not to our servers.
• Support messages and feedback. Your message, reply email, store address and the page you sent it from.
• The onboarding survey (optional). Your answers, plus your store's plan, country and main product category.
• Settings and setup progress. Your app language, whether you want warning emails, and which quick-start steps you have done.
• Meetings and email. If you book a meeting or email us, Google Calendar and Gmail handle it under Google's terms.

4. Your customers

Almost nothing about your customers reaches us. Blocks and rules run inside Shopify's checkout. We never see your customers' names, emails, phone numbers, addresses or payment details, and we haven't asked Shopify for them: Shopify removes them before anything reaches us.

The exception is the post-purchase page, which appears after payment when you use a post-purchase block:

• The offer. To pick an offer, our server receives the buyer's language, shipping country and the products in their order. We count when an offer or survey is shown and when an offer is accepted, as daily totals that can't be traced back to the order.
• Survey answers. We keep the answer and any text typed under “Other”, but not who wrote it. The answer is also saved on the order in your Shopify admin. If a buyer types personal details under “Other”, we can't link them to anyone, and they stay until you delete the block's answers or uninstall.

The order note block saves what the buyer types onto their order in Shopify. It never reaches us.

5. How we use it

• To run the app: sign in your staff and keep your blocks, rules and styles working in your store.
• To show you how your blocks perform.
• To warn you when a block or rule stops working.
• To answer your messages and improve the app.
• To understand which kinds of stores use the app and which features they use, so we can decide what to build next.
• To email you: a warning when a block or rule stops working (turn these off in the app's settings), replies to your messages, one welcome email when you install, and one goodbye email when you uninstall.
• To let our team know when a store installs or uninstalls the app, or answers the onboarding survey. The notice includes the store's name, address, plan, country, age and product count, the owner's email, and the survey answers.

We never sell data, share it with advertisers, build profiles of your customers, or use it to train AI. We never send newsletters or marketing, or email your customers.

6. How long we keep it

What	Kept until
Staff sign-ins	You uninstall. Deleted right away.
Store details, as read from Shopify	You uninstall. Deleted right away.
Everything else in the app: blocks, rules, styles and their history, totals, survey answers, warnings, activity history, settings, onboarding answers, setup progress and support messages	48 hours after you uninstall. Reinstall within 48 hours and it's all still there.
Survey answers	As above, or sooner if you delete the block.
Notices to our team (store details, the owner's email, onboarding survey answers)	Kept as our record of installs. Ask and we'll delete them.
Emails in our support inbox	Kept so we can look back at past conversations. Ask and we'll delete them.
Server logs	A few days, for fixing bugs. They include your store address and, on the post-purchase page, the buyer's IP address. Used only for fixing bugs, never to identify anyone.
Error reports	30 days, for fixing bugs. When the app hits an error, a report goes to our error-tracking service. It includes your store address and the page that failed. It's set to leave out anything about your customers, such as their IP address or order.

7. Where it is stored

The app and its database run in Singapore. Sending email, our support inbox, error reports, meeting bookings, notices to our team and our team's internal usage dashboard use services in the United States or worldwide, and each uses the data only to provide its service to us.

We are not based in the European Union or the United Kingdom. If your store is there, or anywhere else that limits where personal data can go, installing the app sends your store's data to Singapore and to the services above. Where the law requires a safeguard for that, we rely on the standard contractual clauses and the data-processing terms in Shopify's Partner Program Agreement. Need a signed data-processing agreement? Email us.

8. Your rights

Depending on where you are, you can ask to see, correct, delete or get a copy of your data, or object to how we use it. Email us (section 9) and we'll reply within 30 days. Uninstalling the app also deletes everything after 48 hours.

Your customers' requests reach us automatically through Shopify. We hold nothing that identifies a customer, so there is nothing to return or delete. To remove a specific survey answer, tell us the block and roughly when it was sent, and we'll remove it.

9. Contact

Questions, data requests or anything else: [email protected]. A real person reads every message and aims to reply within one day.