Does iPhone have a Wi-Fi & Bluetooth toggle widget in Notification Center? I've just recently bought an iPhone with iOS8 last month. I noticed that although iphone has a control center when locked, it doesn't have any way to toggle Wi-Fi and Bluetooth from the notification center, that's available via apps/default in android phones.

Is there any free app with a widget in iOS8 that can let me toggle these settings via notification center? I searched online, but couldn't find any app.

I don't intend to jailbreak my iphone, although I found some web-blogs suggesting to jailbreak and use Cydia...
You can toggle directly by swiping up from the very bottom of the screen… 

...from the lock screen, home screen or in most apps [in some apps it's difficult to get the swipe to be recognised if the app uses the same part of the screen for a function.]