Quick Correlation Coefficients vs WellNoted
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Quick Correlation Coefficients
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.
- 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
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The correlation coefficient (commonly noted by the Greek letter rho, ρ) measures the degree to which two sets of numbers are related. The correlation coefficient can range from -1.000 to +1.000 with a 0 indicating that there is no relation between the two sets. A 'slider' data entry option allows rapid creation of numerical data. Additionally, you may use the 'keypad' data entry option to expand the numerical range beyond plus or minus 1,000. In this application, you may relate two or three sets of numbers and the correlations between the sets are shown as ρ(AB), ρ(AC), and ρ(BC), where the letters A, B, and C represent the columns. There must be at least 3 pairs of numbers in any 2 rows for the correlation coefficient to be computed. Zero is a number but 'n/a' is not. If, for example, Column A has 5 rows of numbers and the 6th row is 'n/a' and Column B has 4 rows of numbers and the 5th row is 'n/a', the correlation coefficient, ρ(AB), will be computed for the first 4 pairs of numbers.
WellNoted
This AI-powered assistant transforms lectures, meetings, and documents into concise summaries, interactive quizzes, and flashcards. It supports multiple input formats and helps users learn and retain information more efficiently.
- AI-generated summaries
- Interactive flashcards and quizzes
- Audio summaries for on-the-go learning
- Multi-source content support (audio, text, links)
- Smart note organization and enhancement
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WellNoted is your AI-powered note-taking assistant that helps you summarize and retain information effortlessly. Whether you’re a student, professional, or researcher, WellNoted turns long-form content into concise summaries, quizzes, and flashcards, so you can learn faster and more efficiently. Key Features: AI Summaries: Instantly summarize lectures, meetings, books, websites, and YouTube videos into easy-to-read notes. Flashcards & Quizzes: Convert summaries into interactive flashcards and quizzes for better retention. Audio Summaries: Listen to AI-generated summaries so you can learn on the go. Multi-Source Support: Upload audio, text, PDFs, or paste links to generate structured notes. Smart Organization: AI-powered tools to refine, categorize, and enhance your notes. Who is WellNoted for? Students looking to study smarter and retain more information. Professionals who need to quickly summarize meetings and reports. Readers & Researchers who want to extract key insights from books and articles. Content Creators summarizing long-form content into digestible notes. Save time, improve retention, and stay WellNoted. Download now to take your note-taking to the next level. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: WellNoted at 100% against Quick Correlation Coefficients's 0%. WellNoted also leads on rating (4.4 vs 1.0) and update cadence (daily vs every 4 months). Quick Correlation Coefficients's advantage is in-app purchases (none vs 3) and iOS requirement (12.3 vs 17.2). On price, ads 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
Both are free to download. WellNoted sells 3 in-app purchases, starting at $6.99 per 7 days. Quick Correlation Coefficients asks for nothing beyond the download.
WellNoted holds the better App Store score, 4.4 against 1.0. That said, the two scores are not equally well evidenced: WellNoted has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Quick Correlation Coefficients's written reviews are positive against 100% of WellNoted's.
Quick Correlation Coefficients ships an update every 4 months, WellNoted daily. Both last shipped on October 24, 2026.
| Parameter | Quick Correlation Coefficients | WellNoted |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 4.4 (5 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 5 — better |
| Update frequency | Every 4 months | Daily — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 12.3 — better | 17.2 |
| Further details — not scored | ||
| Size | 1 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | MSYapps | Lunar Apps |
Customer experience
Quick Correlation Coefficients
WellNoted
In-app purchases
Quick Correlation Coefficients
No in-app purchases
WellNoted
- Premium Access$6.997 Days
- Premium Access3 Days trial$49.991 Year
- Premium Access3 Days trial$89.991 Year
Questions
Is Quick Correlation Coefficients free?
Is WellNoted free?
Which has better reviews, Quick Correlation Coefficients or WellNoted?
Do Quick Correlation Coefficients or WellNoted have ads?
Which is updated more often, Quick Correlation Coefficients or WellNoted?
Other comparisons
