Product
- PopupsWelcome, exit, and cart offers that ask once.
- Bars and bannersFree-shipping bars, heroes, and countdowns.
- Product rows and toastsFilled from your own catalog.
- Design StudioClick the words, change them, save.
- Targeting and A/B testsWhen, where, who — and A/B on Startup and Grow.
- Unlimited contactsEvery signup kept, on every plan.
- Product deskBulk edits, SEO, and product pictures.
Case studies
- FashionWelcome the drop, then show the rest of the look
- BeautyShow the rest of the routine next to the serum
- HomeA code on the way out, bestsellers on the way in
- Food and drinkA shipping goal, and a welcome code
- TechShow the case and cable with the headphones
Free plan. Billed by Shopify when you upgrade.
Documentation
The tutorial, the guide, and the answers.
Start
Tutorial, guide, pricing, FAQ.
Tutorial
Your first popup live in five minutes. Six steps with what you will see on each screen.
Product guide
Every screen in the app, in the order a new store meets it. Overview, setup, popups, widgets, Library, Studio, products, contacts, plans, data.
Pricing
Free is 3 popups and 3 widgets. Startup is $19 with A/B tests. Grow is $49 with 3,000 coins and same-day help.
FAQ
Short answers on setup, themes, popups, contacts, discount codes, AI coins, billing, speed, and privacy.
Changelog
What changed in each release and when it reached stores.
Contact
Write about install, a store, or a privacy request. We reply within one business day — same day on Grow.
Guide
Overview, setup, popups, widgets, Studio.
Features
Popups, bars, Studio, contacts, and the desk.
Permissions
What Castor asks Shopify for, and why.
Shopify shows this list when you install. Each line is one feature. The three marked optional are requested later, only when you turn on the feature that needs them.
- Products and inventory
- The product desk reads your catalog and sends edits back. Popups and widgets show real products, prices, and stock from the same copy.
- Themes
- Castor reads the theme to tell you whether the Castor App embed is on, and to open the theme editor on the right page when you place a widget. Theme files are never edited.
- Discounts
- A form set to generate a code creates one single-use discount in your Shopify admin, at the percent you chose.
- App proxy and storefront script
- Popups, bars, and widgets load on your store through Shopify's app proxy, so a theme's content policy cannot block them.
- Web pixel and customer events
- Counts views, carts, and orders that follow a popup or widget, as store totals. Castor never shows a profile of one shopper.
- Metaobjects
- Lists your saved widgets in the theme editor picker so you can choose one by name.
- Orders (optional)
- Asked for only when you want Overview to show store sales next to views, signups, and orders. Totals only.
- Customers (optional)
- Asked for only when you turn on sending signups into Shopify customers. Marked as subscriber only when the shopper ticked your consent box.
- Locales (optional)
- Asked for only when you add a translation, so the right language shows to the right shopper.
Help
Support, inside and outside the app.
Instant Support
Bottom right of the app. Answers questions and opens the screen you need, from the theme embed or the Widgets block to a discount code. Free, no coins.
Custom Support
A ticket with up to three screenshots. The team sees it in Admin and replies to your store email within one business day — same day on Grow.
hello@castorapp.com, or the contact form. Privacy requests go to the same address.
Policies