By default,
Search engine on Safari Browser on iPhone/iPad is Google. When you search the
web in Safari browser on iPhone/iPad, iOS default search engine (Google) determines
and show up the results what you look for. 
If you want to change the default
search engine on your Safari Brower on any iOS, you can choose any of the
search engine from the list like Bing, Yahoo, DuckDuckGo etc as your default search engine.
You can change your default search engines on iPhone/iPad of your safari browser
anytime you like.
Here’s we’ll cover how to change your default search engine in Safari on iPhone or iPad running iOS 10,9,8 and 7.
Here’s we’ll cover
how to change your default search engine in Safari on iPhone or iPad running iOS 10,9,8 and 7.
To change the iOS
default search engine, you can go through settings in safari on any iPhone or
iPad running iOS 10.3.2, 10.3.1 or below. This method is
for those who are using the default browser Safari. It is different if you use
Chrome, Mozilla, or Opera.
How to Change
Your Default Search Engine on Safari
  • Go to Settings
    app
    .
  • Tap Safari.
Here’s we’ll cover how to change your default search engine in Safari on iPhone or iPad running iOS 10,9,8 and 7.
  • Select Search
    Engine
    .
Here’s we’ll cover how to change your default search engine in Safari on iPhone or iPad running iOS 10,9,8 and 7.
  • Choose your
    preferred search engine from the list that you want it as default.
Here’s we’ll cover how to change your default search engine in Safari on iPhone or iPad running iOS 10,9,8 and 7.

Now Open Safari browser and enter text you want to search.
Here’s we’ll cover how to change your default search engine in Safari on iPhone or iPad running iOS 10,9,8 and 7.
Whatever
you type and search in Safari browser, it will show up the results from your
default search engine database like Google, Bing, Yahoo and DuckDuckGo.
Share your thoughts and let us know in the comment section.