You can launch Yandex.Navigator for Android or iOS from another app or a page in the mobile browser. Use the yandexnavi URL scheme in the HTML link or the code of your mobile app. Yandex.Navigator will show the user a placemark, a route to follow, or search results, depending on what data was passed to the app.
In order to send point coordinates, search queries, and other data to Yandex.Navigator, you need to get an access key. If data is transmitted without an access key, you may be subject to restrictions.
Registration form is available in Russian.