# Critical Value Calculator vs DarkBlock

The clearest difference is price: Critical Value Calculator at Free against DarkBlock's $4.99. Critical Value Calculator also leads on iOS requirement (10.0 vs 15.0). DarkBlock's advantage is update cadence (every 6 weeks vs every 43 months). On ads, in-app purchases and device support there is nothing between them.

Critical Value Calculator is free to download; DarkBlock costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Critical Value Calculator ships an update every 43 months, DarkBlock every 6 weeks. The most recent releases landed on September 5, 2026 and July 9, 2026 respectively.

## The numbers

| Metric | Critical Value Calculator | DarkBlock |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | — | **[4.3 (3 ratings)](https://appshunter.io/ios/app/darkblock/id6686404503/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 83.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 43 months | **Every 6 weeks** |
| Monetization | — | Paid |
| Size | 25 MB | 1 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPod, Mac | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Ahmad Sattar](https://appshunter.io/developer/1458483953) | [金超 高](https://appshunter.io/developer/1768097432) |

## What reviewers say

### Critical Value Calculator

[App page](https://appshunter.io/ios/app/critical-value-calculator/id1612016227)

**In-app purchases:** none


### DarkBlock

[App page](https://appshunter.io/ios/app/darkblock/id6686404503)

Enhance your browsing experience by permanently hiding unwanted websites from search results and enabling a dark mode in Safari. This utility app offers a cleaner, more focused way to navigate the web.

**Highlights:** Permanently hide websites from search results, Enable dark mode in Safari, Customizable browsing experience, Clean search results

**Features:** Safari Extension

**In-app purchases:** none


## Frequently asked questions

### Is Critical Value Calculator free?

Critical Value Calculator is free to download, with no in-app purchases.

### Is DarkBlock free?

DarkBlock costs $4.99, with no in-app purchases.

### Do Critical Value Calculator or DarkBlock have ads?

Neither Critical Value Calculator nor DarkBlock shows ads.

### Which is updated more often, Critical Value Calculator or DarkBlock?

Critical Value Calculator ships an update every 43 months, and DarkBlock every 6 weeks. Most recently, Critical Value Calculator was updated on September 5, 2026 and DarkBlock on July 9, 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.*