# I'm having trouble using Locksmith with a site speed optimization app. Locksmith isn't supported in combination with site speed optimization apps. It may work with some, but we don't offer support for this combination. ## Apps known to be affected * [Nostra](https://www.nostra.ai/) If you run into an app that should be on this list (or if you find one that *does* seem to work), please let us know: . ## Why isn't this supported? Locksmith's session state is very tightly coupled with the customer's Shopify session state (as managed by the Online Store channel). The two operate hand in hand, and depend on each other. Site speed apps usually work by caching, or by dynamic injection of content delivered from a non-Shopify source. This introduces a layer *between* Locksmith's state and Shopify's state, which creates a synchronization problem, and one that we can't sustainably sign up for. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://www.locksmith.guide/faqs/more/site-speed-apps.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.