# Block Ads vs Catalyst By MetricWire

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.

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.

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.

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.

## The numbers

| Metric | Block Ads | Catalyst By MetricWire |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (656 ratings)](https://appshunter.io/ios/app/block-ads-web-browser-safe/id1562993894/reviews) | **[4.2 (11 ratings)](https://appshunter.io/ios/app/catalyst-by-metricwire/id1585123028/reviews)** |
| Number of ratings | **656** | 11 |
| Positive reviews | 19.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 11 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 272 MB | 225 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [CleverAI Global](https://appshunter.io/developer/1847800784) | [MetricWire Inc.](https://appshunter.io/developer/815033540) |

## What reviewers say

### Block Ads

[App page](https://appshunter.io/ios/app/block-ads-web-browser-safe/id1562993894)

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:** macOS Compatibility, Safari Extension, Vision Pro support

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Adblock Pro - Content Blocker | $3.99 | per 7 days |
| Adblock Pro - Blocker | $5.99 | per 7 days |
| Adblock Pro - Content Blocker | $5.99 | per month |
| Adblock Pro - Content Blocker | $5.99 | per 7 days |
| VPN Master - Safe Browsing | $7.99 | per 7 days |
| Adblock Pro - Content Blocker | $8.99 | per month |
| Adblock Pro - Blocker | $8.99 | per month |
| VPN Pro - Private Network | $12.99 | per month |
| Adblock Pro - Ultimate | $34.99 | per year |
| Adblock Premium | $39.99 | per year |
| VPN Premium | $59.99 | per year |
| Adblock Premium Onetime | $44.99 | one-time |

**What reviewers like**

- 👍 Good app
- 🚀 Blocks ads completely
- 💯 Amazing app

**What reviewers complain about**

- 🐛 Doesn't block ads
- 💰 Paywall for ad blocking
- 🔒 Difficult to cancel subscription
- 🚫 False advertising about being free
- 🤖 Suspicious 5-star reviews

**Reported bugs**

- Crashes on launch
- Breaks web browsing functionality
- Duplicate content on web pages

**Requested features**

- Change age requirement
- Improve cancellation process


### Catalyst By MetricWire

[App page](https://appshunter.io/ios/app/catalyst-by-metricwire/id1585123028)

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:** Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*