> ## Documentation Index
> Fetch the complete documentation index at: https://algolia.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Filtering patterns for InstantSearch iOS

> Learn about UX patterns for filtering and how to implement them in your InstantSearch iOS app.

<div className="not-prose algolia-flavor-switcher">
  <div className="afs-dropdown">
    <div className="afs-trigger" role="button" tabIndex="0" aria-haspopup="listbox">
      <span className="afs-current">iOS</span>

      <svg className="afs-chevron lucide lucide-chevron-down" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
        <path d="m6 9 6 6 6-6" />
      </svg>
    </div>

    <ul className="afs-menu" role="listbox">
      <li role="option" aria-selected="true"><a className="afs-option is-current" href="/doc/guides/building-search-ui/ui-and-ux-patterns/filtering-patterns/ios"><span className="afs-option-name">iOS</span><span className="afs-option-lib">InstantSearch iOS</span></a></li>
      <li role="option" aria-selected="false"><a className="afs-option" href="/doc/guides/building-search-ui/ui-and-ux-patterns/filtering-patterns/android"><span className="afs-option-name">Android</span><span className="afs-option-lib">InstantSearch Android</span></a></li>
    </ul>
  </div>
</div>

<Info>
  Starting May 1, 2024,
  Apple requires all iOS apps to include a privacy manifest.
  For more information, see [Privacy manifest](/doc/guides/building-search-ui/resources/privacy-manifest/ios/).
</Info>

Providing filtering options is common in advanced search experiences.
However, given mobile screen real estate limitations, it's hard to include both filters and search results in the same view without the screen getting cluttered.
A good filtering experience always gives feedback when users apply a filter.

For more information, see the blog post: [showing feedback when filtering](https://www.algolia.com/blog/ux/mobile-search-ux-part-three-seach-results-display/).

## Example

[As you can see in this example](https://github.com/algolia/instantsearch-ios-examples/) of a movie search interface,
filtering options are displayed in a modal window with immediate feedback to let users see their influence on the search results.