# DA PA Checker vs Confidence Interval Calc

The clearest difference is update cadence: Confidence Interval Calc at every 6 days against DA PA Checker's every 12 months. 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.

DA PA Checker ships an update every 12 months, Confidence Interval Calc every 6 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | DA PA Checker | Confidence Interval Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (2 ratings)](https://appshunter.io/ios/app/da-pa-checker/id1602491197/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 18 MB | 30 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | **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

### DA PA Checker

[App page](https://appshunter.io/ios/app/da-pa-checker/id1602491197)

This tool helps you quickly check the Domain Authority (DA) and Page Authority (PA) of websites. It provides accurate scores for individual URLs or in bulk, aiding in SEO strategy and competitor analysis.

**Highlights:** Check Domain Authority (DA), Check Page Authority (PA), Bulk URL checking (up to 20), Easy-to-use interface, Accurate score calculation, Unlimited free usage

**Features:** macOS Compatibility

**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 DA PA Checker free?

DA PA Checker 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 DA PA Checker or Confidence Interval Calc have ads?

Neither DA PA Checker nor Confidence Interval Calc shows ads.

### Which is updated more often, DA PA Checker or Confidence Interval Calc?

DA PA Checker ships an update every 12 months, and Confidence Interval Calc every 6 days. Most recently, DA PA Checker was updated on November 3, 2026 and Confidence Interval Calc on October 30, 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.*