# Critical Value Calculator vs Confidence Interval Calc

The clearest difference is update cadence: Confidence Interval Calc at every 6 days against Critical Value Calculator's every 43 months. Critical Value Calculator's advantage is iOS requirement (10.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Critical Value Calculator ships an update every 43 months, Confidence Interval Calc every 6 days. The most recent releases landed on September 5, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Critical Value Calculator | Confidence Interval Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 43 months | **Every 6 days** |
| Size | 25 MB | 30 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPod, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Ahmad Sattar](https://appshunter.io/developer/1458483953) | [Arsosa Network Inc.](https://appshunter.io/developer/1209042440) |

## What reviewers say

### Critical Value Calculator

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

**In-app purchases:** none


### Confidence Interval Calc

[App page](https://appshunter.io/ios/app/confidence-interval-calc/id6749201174)

**Features:** macOS Compatibility

**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 Confidence Interval Calc free?

Confidence Interval Calc is free to download, with no in-app purchases.

### Do Critical Value Calculator or Confidence Interval Calc have ads?

Neither Critical Value Calculator nor Confidence Interval Calc shows ads.

### Which is updated more often, Critical Value Calculator or Confidence Interval Calc?

Critical Value Calculator ships an update every 43 months, and Confidence Interval Calc every 6 days. Most recently, Critical Value Calculator was updated on September 5, 2026 and Confidence Interval Calc on September 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.*