Apps similar to Custom Search WordPress Plugin include wordpress i-search pro. It's paid, but Relevanssi Light is free. Other options are Chili Search and AddSearch. In total there are four apps like Custom Search WordPress Plugin for the web, self-hosting, Android, iPhone and Mac.
i-Search Pro changes the way of WordPress Search. It’s full WooCommerce compatible. Provide Live search results in milliseconds. Include almost everything in your search results.
Relevanssi Light is a simple, quick and effective search improvement that replaces the default WP search with a fulltext index search.
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Chili Search replaces the WordPress default search with a lightning fast, full-ajax and accurate search.
AddSearch is a lightning fast, accurate and customizable Site Search engine with a Search API. AddSearch works on all devices and is easy to install, customize and tweak.
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