Comparison

Critical Value Calculator vs DarkBlock

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

Head to head
About

Critical Value Calculator

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Perform hypothesis testing through our efficient critical value calculator. Critical value calculator, a hands-on tool for statisticians, calculates t-value and z-value with a click. Single t-value calculator and z-value calculator are available for use yet, they do not suffice the needs of students. However, in this critical score calculator you can calculate both critical values. Now you can get rid of tiresome practice of looking through hundreds of t- and z-value tables because critical value calculator calculates them in an instant. How to perform calculations: Calculate t-value 1. Specify the significance level in the given box. 2. Select degrees of freedom. 3. Calculate t-value Calculate z-value 1. Enter the significance level in the input box. 2. calculate p-value You can reset the critical value calculator by pressing “reset” button. Basic definitions: 1. Critical value: It is the cut-off value of the graph generated by the test static and shows the region where test static does not lie. Critical value depends upon the significance level. T tells whether to accept of discard null-hypothesis. 2. Significance level: Significance level or statistical significance determines that the difference in population cannot be only associated with chance. 3. Null hypothesis: A hypothesis that describes no difference between two data. And if any difference is seen it appears only by chance. It is abbreviated as (Ho). 4. T-value: It is the calculated difference in the graph relative to the data. 5. Z-value: It is a cut-off point area under the standard distribution of data.

About

DarkBlock

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
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1. Permanently hide websites that you don't want in Google Search. 2. Enable Dark Mode in Safari. This app incorporates code from the DarkReader project (https://github.com/darkreader/darkreader), which is MIT Licensed. The license is included below: https://github.com/darkreader/darkreader/blob/main/LICENSE

Screenshots

Critical Value Calculator4 screens
DarkBlock2 screens

Verdict

The call

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.

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

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
Critical Value Calculator versus DarkBlock: the parameters behind the verdict, then further details
ParameterCritical Value CalculatorDarkBlock
PriceFree — better$4.99
Rating—4.3 (3 ratings) — better
Positive reviews—83.3% of reviews
Number of ratings—3 — better
Update frequencyEvery 43 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPod, MaciPhone, iPad, iPod, Mac — better
Requires iOS10.0 — better15.0
Further details — not scored
Size25 MB1 MB
Age rating4+4+
DeveloperAhmad Sattar金超 高

In-app purchases

None

Critical Value Calculator

No in-app purchases

None

DarkBlock

No in-app purchases

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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