Theme compatibility

Applies to: TreStack Timer, every plan
Updated: 26 September 2026

What the app needs from a theme

The app embed, which the theme editor lists under App embeds. With it on, each automatic timer finds its spot in the page the theme renders: the Add to cart form for a product timer, the top or bottom of the page for a bar, the main content for a landing timer, and the cart form or drawer for a cart timer.

Custom positions need the app block, and app blocks need a theme whose sections accept them, which is what Online Store 2.0 themes do. The measurements on the performance page were taken on Shopify Horizon theme.

Older themes and page builders

A vintage theme has no sections that accept app blocks, so custom positions are not available on one. The app checks your live theme and says so on the Placement tab instead of offering an app block that would not work. We have not tested the automatic positions on vintage themes. Try it on the Free plan, and write to us with the theme name before you pay for a plan.

A page builder section that accepts app blocks can hold the app block. A product page built by a page builder may use its own Add to cart form, which the automatic product position may not find. In that case, set the timer to Custom position and place the app block inside the builder section.

Switching or upgrading a theme

Your timers live in the app, so a new theme changes none of them. What belongs to a theme is the app embed switch, its cart drawer selector if you set one, and any app blocks. Turn the embed on in the new theme and place the blocks again. The app checks the embed status again when a theme is published, so the app Home tells you if you missed it.

Switching themes, in four steps.

Settings reference

If this does not work

The failures most likely on this procedure, with the check that resolves each one.