[artimaeis]

If you're talking about within the Chrome app on Android then, unless something changed in Marshmallow, you can totally change the default search provider. Chrome > Menu > Settings > Search Engine allows you to change the default search engine in the browser, but you can't add new ones to their list, so it is a limited set of options available.

If you're talking about at the Google Now or Siri then as far as I know that's not possible on either OS.

[_delirium]

The one I find most annoying on Android is the search bar on the home screen. Even though you can customize most of the rest of the screen, you can't change the search provider for that bar, or even just remove the bar. At least, not without replacing the launcher entirely, with something like Nova Launcher (http://novalauncher.com/), which is what I eventually did.

[notatoad]

This is not really an android flaw but a nexus one, because its default launcher is part of the google search app. On many android phones, the search box is a widget that can be swapped out with a widget from any other search provider or removed entirely.

[kuschku]

But this bar also appears on the "Recent Apps" menu, and can’t be changed there, at all.

You only get either the bar, or an error message, which says the Google App can not be found.

[kuschku]

I am talking about the Google Search bar in the Recent Apps menu on Android.

It’s at the top since 5.0, can’t be removed, can’t be changed.

If you root and disable the Google App (yes, you now need root for that), then it is replaced with an error message, saying that the Google App could not be found.

There is no way to replace it with a search bar for bing, or remove it.

[cust0m]

you can change the default search provider in siri