Steps to Add a Testmonial Slider App on a Tumblr Site
Create your customized Testmonial Slider app, match your website's style and colors, and add Testmonial Slider to your Tumblr page, post, sidebar, footer, or wherever you like on your site.
How To Add a Testmonial Slider App on Tumblr:
Create a Free Testmonial Slider App
Start for free nowEdit Theme
In the Tumblr Editor, open your Account Settings and select Edit Appearance. On the next page, select Edit Theme.Edit HTML
Click on the Edit HTML link underneath Custom Theme.Paste Script
Paste the POWR script into the HTML file between the Head tags. Then click Update, and save.Create Text Post
Return to your Tumblr Admin page, and create a new Text post.Paste Shortcode
Paste this shortcode into the post and save. If you expand the post, you will see your new POWR Testmonial Slider.Click the POWR Settings Icon to open the POWR Editor.To edit your Testmonial Slider on Tumblr:
Go to the live Tumblr website and click the Settings Icon in the upper right corner of the Testmonial Slider plugin.
Undecided if our Testmonial Slider app will suit your needs? We have all the details you need.
See the detailsRemove the Guesswork of Building Your Brand
Establishing Brand Identity 101 - Your Website
Congratulations on starting to grow your company online -- by getting your Tumblr website live on the web!
Here comes the next big question: How do you get site visitors to engage and buy your product or service?


Make Your Website Elements Unique
Some may first take a stab at to DIY a Testmonial Slider app or 'knows a guy' that can build one in 'no time'.
Others attempt to find open source Testmonial Slider apps, or foreign companies that claim to offer Testmonial Slider apps at rock-bottom prices.
Reduce Time Spent by Half With POWR
Plus, updating and customizing a Testmonial Slider app can be difficult, and you may think you have to hire a developer.
Additionally, as your business expands, hackers could see an unsecured Testmonial Slider as a great opportunity to exploit your business and your customers. We consider this and built safeguards!


POWR has the most advanced security features, is built for scale, and currently supports high-volume sites on Tumblr and other similar platforms.

Our team of expert engineers work relentlessly to make sure the POWR apps such as your Tumblr Testmonial Slider running smoothly for you.
CASE STUDY: Rbia Shades is winning with POWR apps
A few months after Rbia Shades launched at local fairs and craft shows, they were looking for a way to sell online.
They wanted to visually appeal to site visitors and demonstrate the quality of their product and lightweight, ergonomic designs.
Their web host did not provide an adequate solution for this, and after some research, decided to give POWR a try.
Shortly after signing on with POWR, Rbia’s first step was to install a popup. They increased their contacts by over 250% (over 600 real contacts).
Soon after, they added our Social Feed app and grew their social media following to over 6000.
Next, they added a Media Slider as a visual way to quickly show their products to new site visitors as they entered their homepage to show how the accessories looked in real life. It showcases their products well and gave customers a great on-site experience.
In fact, they quickly found that visitors who interacted with POWR apps on their site stayed engaged 2.5 times longer than ever before.

POWR apps are made to grow your online revenue.
See apps in action
Trusted by the best in the biz!
POWR has helped over a half million businesses on every continent
(besides Antarctica, because of course not)
Frequently Asked Questions
Learn more about how to add POWR apps to your website.
Yes, any POWR app will work perfectly on any website. What’s better, is the patented POWR Live Editor is the same regardless of the app.
- Easily add more than one (for free)
- Edit to your needs directly from your live site
- Changes are made instantly
Absolutely! The POWR Testmonial Slider widget is optimized for mobile, ensuring that it looks great and functions smoothly across all devices, including phones and tablets.
This optimization enhances user experience, contributing to higher engagement rates on your Tumblr site.
POWR Testmonial Slider allows you to edit every detail such as fonts, colors, borders, and spacing directly from the editor, ensuring your Testmonial Slider perfectly match your brand's identity.
This flexibility makes it easy to integrate and align with your site's look and feel.
Adding Testmonial Slider to your Tumblr site is fully outlined above and straightforward with no coding required.
Simply follow POWR's setup guide, which is as easy as copy/pasting the provided code snippet into your site's HTML.
This ease of installation makes it convenient for Tumblr site owners to implement Testmonial Slider and gather feedback from their audience.
Using POWR Testmonial Slider on your Tumblr site offers numerous benefits, including enhanced customization options and easy installation without coding.
These features help improve your site's user engagement by allowing visitors to provide valuable feedback, leading to better online growth.


