One theme block, every Shopify plan
Drop a single block into your theme and the personalizer appears. Personalization fees sit on real Shopify products, so discount codes, abandoned-cart emails and anything else that reads a cart keeps working.
No theme code to maintain
Customei ships as a theme app block. You add it in the theme editor, position it where you want on the product page, and that is the install. Nothing is injected into your Liquid, so a theme update does not silently break your personalizer and you are not carrying a snippet somebody added in 2023.
- Theme editor placement
- Drop it under the variant picker, in a tab, or on a dedicated page.
- No Liquid edits
- Uninstalling removes the block cleanly.
- Theme-aware styling
- Inherits your fonts and colours, with CSS overrides when you want to be specific.
Fees that behave like products
Personalization charges are the part most apps get wrong. Customei puts them on real Shopify line items: hidden fee variants on Basic through Advanced, and a Cart Transform Shopify Function on Plus. Both mean discount codes apply correctly, abandoned-cart flows show the right total, and your accounting exports balance.
- Basic → Advanced
- Hidden fee variants, generated and cleaned up automatically.
- Shopify Plus
- Cart Transform function — no extra line items in the cart at all.
- Automatic switch
- Upgrade to Plus and the mechanism changes over on its own.
Where the personalizer lives is your call
Inline under the variant picker converts best for simple products. A modal keeps a long option set from pushing the buy button below the fold. A dedicated customization page suits configurators with a dozen steps. Same block, three placements.
Specifications
The numbers, so you can check them against what your production partner actually needs.
- Install method
- Theme app block — no code
- Fee mechanism
- Hidden fee variants · Cart Transform on Plus
- Placements
- Inline · Modal · Dedicated page
- Theme matching
- Inherited fonts and colours, plus CSS overrides
- Uninstall
- Remove the block — no leftover Liquid
Step-by-step install guide: https://docs.customei.com/install.
Questions people ask
Will it work with my theme?
Keep reading
Next step
Try it on your
own product.
Install Customei, attach an option set, and see this working on a real listing. Every plan ships with a 14-day trial — no card.