Comparison

Block Ads vs Catalyst By MetricWire

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Block Ads

This app enhances your browsing experience by blocking intrusive advertisements and pop-ups across websites and video platforms. It also provides advanced privacy protection by preventing trackers from collecting your data, ensuring a cleaner, faster, and more secure online journey.

Highlights
  • Safari ads blocker
  • Ad-Free YTube
  • Block tracking
  • Block ads by region
  • Block adult sites
  • Custom block/allow lists
  • Hide article comments
Features
Read full description

Block Ads: Web Browser Safe is the best ad blocker for Safari app and Ad-Free YTube experience. It will not only remove annoying ads but also secure your privacy with advanced tracking protection and gives users a peaceful and enjoyable web experience. Have you ever been continually swamped with advertisements, pop-ups, banners, commercial links disguised within content, or auto-play videos that suddenly appear? By blocking annoying ads from the browser you're visiting, Block Ads: Web Browser Safe will rescue you from the persistent discomfort of these ads! It is free to use and does a fantastic job of removing advertisements for Safari. With Block Ads: Web Browser Safe, you can enjoy a cleaner, faster, and more private browsing experience. Download now and start your web browser no ads! KEY FEATURES of Block Ads: Web Browser Safe: - Safari ads blocker. - Ad-Free YTube - Block tracking: Protect your information from being tracked by websites and social media. - Block ads from specific regions. - Block adult sites: block 18+ websites. - Block Sites: Add websites you wish to block. - Allow List: Allow ads on specific websites. - Hide Article Comments: Block comments where they aren't the primary focus. Blocking ads in the Safari browser Removes all kinds of ads in Safari including banners, pop-ups, video ads and everywhere else. Say goodbye to annoying ads and have a safe experience while surfing on websites. Ad-Free YTube It is easy to block all YTube ads: pre-roll video ads, text & banner ads. With Block Ads, you can save time by stopping those useless advertisements. Privacy protection Say no to trackers with advanced protection. The web is full of trackers that literally watch your every click. Block Ads: Web Browser Safe additionally blocks tracking sites on the web that collect information about you. Block ads from specific regions Block Ads: Web Browser Safe helps you block ads in specific languages such as English, German, Dutch, French, Chinese, Japanese, Vietnamese,... Block site for adults Some websites always appear with weird adult content like porn pop-ups, adult videos, dating apps or other 18+ content. With Block Ads: Web Browser Safe, you can block them entirely and browse without distractions. Create Block Sites & Allow List Manually add the website URL to block ads to the Block Sites and build blocking rules according to the actual situation. Block Ads: Web Browser Safe also includes a Allow List, enabling you to add trusted websites and perhaps those you want to support by allowing ads to your exceptions list. Hide Article Comments Block or hide the comment sections in articles where they aren't the main focus, allowing you to focus solely on the content. Download now to make your internet-surfing isn't disruptive. HOW TO ENABLE Block Ads: Web Browser Safe: - Download Block Ads: Web Browser Safe in AppStore. - Proceed to "Safari" browser settings. - Select "Extensions" then tap "Content Blockers" and turn "ON" all our extensions. SUBSCRIPTION PRICING & TERMS: - Payment will be charged to your iTunes Account as soon as you confirm your purchase. - You can manage your subscriptions and turn off auto-renewal from your Account Settings after the purchase. - Subscription will renew automatically, unless you turn off auto-renew at least 24 hours before the end of the current period. - The cost of renewal will be charged to your account in the 24 hours prior to the end of the current period. - When canceling a subscription, your subscription will stay active until the end of the period. Auto-renewal will be disabled, but the current subscription will not be refunded. - Any unused portion of a free trial period, if offered, will be forfeited when purchasing a subscription. Terms of service: https://clever-ai-global.web.app/term.html Privacy policy: https://clever-ai-global.web.app/policy.html

About

Catalyst By MetricWire

Participate in digital health research by responding to surveys, completing tasks, and connecting wearable devices. This app facilitates communication with your study team and integrates with Apple HealthKit for movement data collection.

Highlights
  • In-the-moment surveys and assessments
  • Task completion for research
  • Wearable device connectivity
  • Smartphone sensor tracking
  • Communication with Study Team
  • Apple HealthKit integration
Features
Read full description

Catalyst by Metricwire makes it easy for people to participate in digital health research. With your help, we can generate evidence to inform new digital health solutions and improve connected care. As part of your participation in a research study, you will be asked to respond to in-the-moment surveys or assessments and complete tasks. You may also be asked to connect your wearable devices or allow your smartphone sensors to be tracked. The app includes tools to help you communicate with your Study Team and resources to facilitate your participation. Your app experience is unique and has been designed by the Study Team using the Metricwire Research Portal. Catalyst integrates with Apple HealthKit to collect movement data such as sleep, step count, exercise, and distance if enabled by the Study Team. All of the data you submit during your study experience is protected by Metricwire and controlled by your Study Team. If you would like to access any of your data at any time during your participation, please get in touch with the Study Team or reach out to privacy@metricwire.com, and we will help facilitate your request. If you are a researcher interested in collaborating on a study, reach out to reseach@metricwire.com.

Screenshots

Block Ads4 screens
Catalyst By MetricWire4 screens

Verdict

The call

The clearest difference is review sentiment: Catalyst By MetricWire at 100% against Block Ads's 19%. Catalyst By MetricWire also leads on in-app purchases (none vs 12) and update cadence (every 11 days vs every 2 months). Block Ads's advantage is ratings volume (656 vs 11). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Block Ads sells 12 in-app purchases, starting at $3.99 per 7 days. Catalyst By MetricWire asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Catalyst By MetricWire holds the better App Store score, 4.2 against 4.0. That said, the two scores are not equally well evidenced: Block Ads has 656 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 19% of Block Ads's written reviews are positive against 100% of Catalyst By MetricWire's.

UpkeepUpdate frequency

Block Ads ships an update every 2 months, Catalyst By MetricWire every 11 days. The most recent releases landed on October 21, 2026 and October 17, 2026 respectively.

Scorecard6 real differences · 4 level
Block Ads versus Catalyst By MetricWire: the parameters behind the verdict, then further details
ParameterBlock AdsCatalyst By MetricWire
PriceFreeFree
Rating4.0 (656 ratings)4.2 (11 ratings) — better
Positive reviews19.5% of reviews100.0% of reviews — better
Number of ratings656 — better11
Update frequencyEvery 2 monthsEvery 11 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.0 — better15.0
Further details — not scored
Size272 MB225 MB
Age rating17+4+
DeveloperCleverAI GlobalMetricWire Inc.

Customer experience

Block Ads

All ratings653 ratings
Positive74.4%
Neutral3.1%
Negative22.5%
Written reviews77 reviews
Positive19.5%
Neutral3.9%
Negative76.6%

Catalyst By MetricWire

All ratings11 ratings
Positive81.8%
Neutral0.0%
Negative18.2%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Block Ads

Reported bugs

3 issues
  • Crashes on launch
  • Breaks web browsing functionality
  • Duplicate content on web pages

Requested features

2 requests
  • Change age requirement
  • Improve cancellation process

Catalyst By MetricWire

Not enough reviews yet to summarise bugs or requests.

In-app purchases

12 purchases

Block Ads

Subscriptions11
  • Adblock Pro - Content Blocker$3.997 Days
  • Adblock Pro - Blocker$5.997 Days
  • Adblock Pro - Content Blocker7 Days trial$5.991 Month
Show 8 more
  • Adblock Pro - Content Blocker3 Days trial$5.997 Days
  • VPN Master - Safe Browsing3 Days trial$7.997 Days
  • Adblock Pro - Content Blocker$8.991 Month
  • Adblock Pro - Blocker3 Days trial$8.991 Month
  • VPN Pro - Private Network1 Month trial$12.991 Month
  • Adblock Pro - Ultimate3 Days trial$34.991 Year
  • Adblock Premium3 Days trial$39.991 Year
  • VPN Premium$59.991 Year
One-time1
  • Adblock Premium Onetime$44.99
None

Catalyst By MetricWire

No in-app purchases

Questions

Is Block Ads free?
Block Ads is free to download, with in-app purchases available.
Is Catalyst By MetricWire free?
Catalyst By MetricWire is free to download, with no in-app purchases.
Which has better reviews, Block Ads or Catalyst By MetricWire?
Catalyst By MetricWire is rated higher. Block Ads averages 4.0 out of 5 from 656 ratings, while Catalyst By MetricWire averages 4.2 from 11 ratings.
Do Block Ads or Catalyst By MetricWire have ads?
Neither Block Ads nor Catalyst By MetricWire shows ads.
Which is updated more often, Block Ads or Catalyst By MetricWire?
Block Ads ships an update every 2 months, and Catalyst By MetricWire every 11 days. Most recently, Block Ads was updated on October 21, 2026 and Catalyst By MetricWire on October 17, 2026.

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