The Best Ad Blockers of 2021

Best Ad Blockers BadgeWe’ve selected AdGuard as our top pick for ad blockers because it offers users the highest degree of customization. In addition to the multiple filters that are available, you can create your own custom rules for what gets blocked and what doesn’t. If customization is not your top priority, we’ve also reviewed nine other ad blockers that are worth checking out.

Top 10 Ad Blockers to Try

How We Chose the Best Ad Blockers

We looked for ad blockers that include features for eliminating all types of online advertisements, including pop-up, banner, and video ads. In addition to getting these annoying distractions out of your sight, an effective ad blocker offers performance and privacy benefits as well.

Choose the ad blocker app that’s right for you

There’s no one-size-fits-all solution for ad blocking. The right app for you will depend on your specific needs. For example, you might want a lightweight app that is solely dedicated to ad blocking, or you may be interested in a more comprehensive tool that is bundled with other features.

Flexibility is one of the most important ad blocker features

One issue that often arises with ad blockers is that they can prevent you from accessing content that you actually want to see. For this reason, we recommend ad blockers that provide you with plenty of features for controlling your web browsing experience, such as whitelisting and custom filters.

Our Ad Blocker Reviews

AdGuard — Top Pick

AdGuard feature

Download: Android | iOS

The AdGuard for Android app is a no root ad blocker that works in all apps and browsers and is available as a standalone apk file. Their iOS app works for Apple’s Safari browser, and it also offers access to AdGuard Premium features for an additional fee ($0.99 per month, $4.99 per year, or $12.99 for a lifetime subscription). The free version for each of these platforms offers a selection of pre-set filters and allows you to whitelist your favorite sites. AdGuard Premium includes additional features such as DNS privacy and extra security tools.

Notable Features:

  • Free version available
  • In-app purchases: $0.99 – $12.99 per item
  • Support: FAQ, Email, Phone, Knowledge Base
AdGuard Pros & Cons
What we like What we don’t like
Free versions available for Android and iOS Some features cost extra
Whitelisting feature  
Variety of support options  

AdBlock — Best Value

AdBlock feature

Download: Android | iOS

It’s easy to see why AdBlock was chosen as a close second to AdGuard in our ad blocker rankings. This powerful yet lightweight app is able to eliminate all types of online advertisements, including pop-ups, banners, and video ads. It also prevents advertisers from tracking you across the internet, and it allows you to improve the page load speed of your browser and the battery life of your device. And best of all, both the Android and iOS versions of this app are completely free. The downside is that AdBlock lacks some of the features that are offered by many other options — for example, there’s no custom filters feature.

Notable Features:

  • Free software, no in-app purchases available
  • Support: Help Center, Email, Tickets
AdBlock Pros & Cons
What we like What we don’t like
Completely free to use No custom filters feature
Blocks many different types of ads  

AdBlocker Ultimate feature

Download: Android | iOS

With over 10 million installs and 2 million daily users, AdBlocker Ultimate is certainly one of the most popular ad blocking apps out there. When you’re using a web browser on your mobile device, this app will allow you to block ads on Facebook, YouTube, and all other sites. There are no predefined acceptable ads, and you can set up your own custom whitelist. It should be noted that this app only works on your browser, so if you were using an app that’s not an internet browser (for example, the standalone YouTube app), ads could still get through.

Notable Features:

  • Free versions available
  • In-app purchases: $1.99 per item
  • Support: Help Center, Chat, Tickets
AdBlocker Ultimate Pros & Cons
What we like What we don’t like
No predefined acceptable ads No phone support
Whitelisting feature  

AdLock — Most Versatile

AdLock feature

Download: Android | iOS

AdLock is available on all major platforms, including Windows, macOS, Android, and iOS. Like all of the best ad blockers, AdLock does not use an acceptable ads concept and won’t force you to whitelist any sites. One of the best features of this solution is anti-adblock detection, which allows you to bypass the walls some sites put up to prevent users from accessing their content while using an ad blocker. They also allow you to create your own custom filter lists.

Notable Features:

  • In-app purchases: $4.99 per item
  • Support: FAQ, Email, Phone
AdLock Pros & Cons
What we like What we don’t like
Anti-adblock detection No live chat support
Custom filter list  

Ghostery — Best Browser

Ghostery feature

Download: Android | iOS

Unlike the apps that allow you to block ads on a browser that you’re already using, Ghostery gives you an option to use a different browser entirely. Indeed, Ghostery is a complete mobile web browsing application, and what sets it apart from more popular browsers such as Samsung Internet and Safari is its commitment to privacy and security. Ghostery’s features include a built-in ad blocker, tracker visibility, and “ghost tabs” for private browsing.

Notable Features:

  • Free software, no in-app purchases available
  • Support: FAQs, Trackers
Ghostery Pros & Cons
What we like What we don’t like
Completely free to use Not an option if you’re already happy with your browser
Full-featured web browsing application No live support
Robust privacy and security features  

Firefox Focus — Best Performance

Firefox Focus feature

Download: Android | iOS

Like Ghostery, Mozilla’s Firefox Focus is its own browser rather than an ad blocker app you use with other browsers. Mozilla knows how to build a web browser — their Firefox app has long been one of the top three most popular browsers in the world. So, it should come as no surprise that their privacy-centered browser, Firefox Focus, is also a big hit (over 5 million installs from Google Play alone). Firefox Focus automatically blocks ads and web tracking, resulting in blazing fast page load speeds.

Notable Features:

  • Free software, no in-app purchases available
  • Support: Help Articles, Ask the Community/Support Forums
Firefox Focus Pros & Cons
What we like What we don’t like
Completely free to use Not an option if you’re already happy with your browser
Full-featured web browsing application No live support
Exceptional performance  

CyberSec from NordVPN — Best Security

NordVPN’s CyberSec feature

Download: Android | iOS

NordVPN’s CyberSec feature automatically blocks ads and malicious websites, protecting you from hackers, viruses, and all sorts of other threats that are out there on the internet. Of course, with NordVPN, you also get the benefits of connecting to a virtual private network — your web traffic is encrypted, and you’ll be able to browse the internet completely anonymously. But even though these apps are free to download, you’ll need to pay a regular fee to continue using this service.

Notable Features:

  • 30-Day Free Trial
  • In-app purchases: $5.99 – $91.00 per item
  • Support: Help Center, Live Chat, Email
CyberSec from NordVPN Pros & Cons
What we like What we don’t like
Full-featured VPN solution Must pay to use
Exceptional security  

Opera Browser — Best User Interface

Opera Browser feature

Download: Android | iOS

This web browser comes with a native ad blocker. When turned on, intrusive ads will be blocked for a faster and less distracting user experience. Speaking of user experience, it’s worth noting that Opera Browser has received a lot of recognition (including a Red Dot Award) for its intuitive interface. Your web browser is surely one of the apps on your device that you’ll use the most, so it’s important for it to be easy to navigate and aesthetically pleasing.

Notable Features:

  • Free software, no in-app purchases available
  • Support: Help & FAQ, Phone, Tickets
Opera Browser Pros & Cons
What we like What we don’t like
Completely free to use Not an option if you’re already happy with your browser
Full-featured web browsing application  
Exceptional user interface  

AdAway — Most Customizable

Adaway App Image

Download: Android

As an open source project, one of the biggest benefits of AdAway is that it’s completely free to use. This app is also highly customizable — you can easily add exceptions to your whitelist, blocklist, and rules for redirects. The only downside to AdAway is that this app is not available for Apple devices.

Notable Features:

  • Free mobile app
  • Support: FAQ, Tickets
AdAway Pros & Cons
What we like What we don’t like
All features included for free Not available on iOS
Highly customizable

AdClear by Seven — Best for Blocking Ads on Apps

AdClear feature

Download: Android | iOS

All of the apps in this guide are able to block ads when you’re using a web browser, but most of them aren’t able to do anything about the ads that appear in other apps (this is a particular big issue if you often use your device to play mobile games). That’s not the case with AdClear. With its DNS changer feature, you can block ads in your favorite apps as well as your preferred web browser. AdClear also blocks trackers that follow you from site to site, and their ad blocking filters are updated daily. Finally, despite all these advanced features, the app is completely free to use. 

Notable Features:

  • Free software, no in-app purchases available
  • Support: FAQ, Email, Phone, Forum
AdClear by Seven Pros & Cons
What we like What we don’t like
Completely free to use No whitelisting feature
Can block ads in apps as well as browsers  
Robust support resources  

Ad Blockers: Features Summary Table

Ad Blockers Comparison Table
App In-App Purchases Features
AdGuard — Top Pick $0.99 – $12.99 per item ✓ Account Required
✓ Available on Multiple Browsers
✓ Blocks Video
✓ Spyware Filter
AdBlock — Best Value None available ✕ Account Required
✓ Available on Multiple Browsers
✓ Blocks Video
✓ Spyware Filter
AdBlocker Ultimate — Most Popular $0.99 per item ✕ Account Required
✓ Available on Multiple Browsers
✓ Blocks Video
✓ Spyware Filter
AdLock — Most Versatile $4.99 per item ✕ Account Required
✓ Available on Multiple Browsers
✓ Blocks Video
✓ Spyware Filter
Ghostery — Best Browser None available ✕ Account Required
✕ Available on Multiple Browsers
✓ Blocks Video
✕ Spyware Filter
Firefox Focus — Best Performance None available ✕ Account Required
✕ Available on Multiple Browsers
✓ Blocks Video
✕ Spyware Filter
CyberSec from NordVPN — Best Security $5.99 – $91.00 per item ✕ Account Required
✓ Available on Multiple Browsers
✓ Blocks Video
✓ Spyware Filter
Opera Browser — Best User Interface None available ✕ Account Required
✕ Available on Multiple Browsers
✓ Blocks Video
✓ Spyware Filter
AdAway — Most Customizable Free ✕ Account Required
✕ Available on Multiple Browsers
✓ Blocks Video
✕ Spyware Filter
AdClear by Seven — Best for Blocking Ads on Apps None available ✕ Account Required
✕ Available on Multiple Browsers
✓ Blocks Video
✓ Spyware Filter