> For the complete documentation index, see [llms.txt](https://staylime.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://staylime.com/docs/theme-companion/getting-started/overview.md).

# Overview

Theme Companion is a Shopify app by [Staylime](https://staylime.com/) that helps you maintain and extend your theme: update it to new versions without losing your customizations, add ready-made sections, and style it with your own fonts.

* [Theme updates](/docs/theme-companion/theme-updates/how-theme-updates-work.md) — update your theme to a new version and keep your customizations.
* [Sections](/docs/theme-companion/sections/adding-sections.md) — add ready-made sections and customize them in the Theme Editor.
* [Fonts](/docs/theme-companion/fonts/managing-fonts.md) — add custom fonts or Google Fonts to your theme.

{% hint style="info" %}
**Theme updates** and **Fonts** work with supported themes only; **Sections** work with any Online Store 2.0 theme. See [Supported themes](/docs/theme-companion/getting-started/supported-themes.md).
{% endhint %}

Theme Companion is growing: we're working on new modules to help you maintain and keep improving your storefront, and we're adding support for more themes over time.


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