Manoj

AMS Page Scroll Back To Top is a WordPress Plugin which allows to add and customize a button that appears only at specific page height and scroll to the top of the page. 
The plugin comes with different options and settings for easy customization of the appearance of the button. 
No any kind of HTML or CSS knowledge is required.
To customize the button go to Settings -> AMS Page Scroll Back.

AMS Page Scroll Back To Top

Review

The button added by the plugin allows users to scroll smoothly to the top of the page.

Nazmul Islam

This plugin will add a Scroll To Up button in your site footer right. Here is very easy to setup for change color option and many more. First install the plugin and let’s see.
Features: 
<ul>
<li>Easy Customization</li>
<li>Super Lightweight</li>
<li>Unlimited color Selection</li>
<li>Plugin Option Panel</li>
<li>Super easy Installation.</li>
<li>Responsive for all devices.</li>
<li>All browser supported.</li>
<li>Super Lightweight, only 60 KB.</li>
<li>Unlimited colors.</li>
<li>Works with every version of wordpress.</li>
<li>24/7 Support for free</li>
</ul>
Wanna see how it’s works? Click here : <a href="http://lumianszone.com/plugins/lz-scroll-up/" rel="nofollow ugc">LZ Scroll Bar Up Demo</a>

LZ Scroll Bar

LZ Scroll Bar Up is an awesome, Super lightweight plugin for your wordpress website

AMS Page Scroll Back To Top vs LZ Scroll Bar