# Quick Correlation Coefficients vs iAspire

The clearest difference is rating: iAspire at 5.0 against Quick Correlation Coefficients's 1.0. iAspire also leads on ratings volume (5 vs 1). Quick Correlation Coefficients's advantage is iOS requirement (12.3 vs 15.6). On price, update cadence, ads and in-app purchases there is nothing between them.

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

iAspire holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: iAspire has 5 ratings behind it against 1, so its average is the more settled of the two.

Quick Correlation Coefficients ships an update every 4 months, iAspire every 8 months. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Quick Correlation Coefficients | iAspire |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/quick-correlation-coefficients/id478355922/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/iaspire/id1577273887/reviews)** |
| Number of ratings | 1 | **5** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 8 months |
| Monetization | Free | Free |
| Size | 1 MB | 1 MB |
| Requires iOS | **12.3** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MSYapps](https://appshunter.io/developer/458482419) | [Dulead LLC](https://appshunter.io/developer/1577273889) |

## What reviewers say

### Quick Correlation Coefficients

[App page](https://appshunter.io/ios/app/quick-correlation-coefficients/id478355922)

This app calculates the correlation coefficient between two or three sets of numerical data. It offers flexible data entry methods, including a slider and keypad, and handles missing values to compute relationships accurately.

**Highlights:** Calculate correlation coefficient (rho), Relate two or three data sets, Slider data entry, Keypad data entry, Handles missing data (n/a), Minimum 3 data pairs required

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### iAspire

[App page](https://appshunter.io/ios/app/iaspire/id1577273887)

This app streamlines teacher observations, evaluations, and professional development. It facilitates feedback, artifact collection, and personalized growth plans to enhance staff performance and school culture. The platform also supports school-wide pulse surveys and recognition programs.

**Highlights:** Teacher observation and evaluation tools, Artifact collection (photos, videos), Customizable observation forms, Micro-learning professional development, Professional growth plan creation, School culture pulse surveys, Recognition and feedback cadences

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Quick Correlation Coefficients free?

Quick Correlation Coefficients is free to download, with no in-app purchases.

### Is iAspire free?

iAspire is free to download, with no in-app purchases.

### Which has better reviews, Quick Correlation Coefficients or iAspire?

iAspire is rated higher. Quick Correlation Coefficients averages 1.0 out of 5 from 1 ratings, while iAspire averages 5.0 from 5 ratings.

### Do Quick Correlation Coefficients or iAspire have ads?

Neither Quick Correlation Coefficients nor iAspire shows ads.

### Which is updated more often, Quick Correlation Coefficients or iAspire?

Quick Correlation Coefficients ships an update every 4 months, and iAspire every 8 months. Most recently, Quick Correlation Coefficients was updated on October 24, 2026 and iAspire on October 14, 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.*