What happens to try-on when I switch themes entirely?

Why the block does not follow the new theme

Looksy is a theme app extension: the try-on block is added and positioned in the theme editor, with no edits to theme code. That design is why an uninstall leaves no code behind, and it also means block placement lives with each theme. Switch to an entirely different theme and the new theme arrives with its own editor configuration and no Looksy block in it yet. The app itself is still installed on your store — nothing has been uninstalled — but until you add the block in the new theme's editor, shoppers will not see try-on.

Re-add and position the block before you publish

In the new theme's editor, add the Looksy app block to your product pages and place it where you want it, exactly as you did the first time. This is drag-and-position work, not development — no theme code edits are involved. Treat it as a chance to reconsider placement too: a new theme's product page layout may put the old position somewhere less visible. While you are in the editor, confirm the block appears on the products you have enabled and that its position works on the new layout at mobile widths as well as desktop.

Test on the unpublished theme, then switch

Shopify lets you set up a new theme while the current one stays live, and that is the safe path: add the Looksy block to the unpublished theme and use the preview to confirm it renders where you placed it. Whether every part of the flow behaves identically in a theme preview is something to verify rather than assume — run a test try-on in the preview, and if anything looks off, check with Looksy support before you publish rather than debugging on live traffic. The same goes for app settings: confirm your product selections and any customizations carry across to the new theme as expected.

What a theme switch does not touch

You do not need to uninstall and reinstall Looksy to change themes. Your plan, credits, and billing sit with the app and run through Shopify's usage-based billing, not through the theme, so none of that resets when you publish a new design. The clean-uninstall model in the listing describes what happens if you remove the app entirely — a theme switch is a smaller event than that. If you are iterating on your existing theme rather than replacing it, that is a different situation; see the page on running try-on during a theme redesign.

Sources: the public Shopify App Store listing for Looksy. Last checked 27 July 2026.

Related questions: What should I ask Looksy support before scaling up? · What happens to try-on if I sell or transfer my store? · How do I QA try-on before a big campaign?