Comparison

Quick Correlation Coefficients vs Statistics AI

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

Head to head
About

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.

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
Read full description

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.

About

Statistics AI

Features
Read full description

Struggling with statistics homework? Statistics AI is your 24/7 study companion that turns confusion into confidence. Snap a photo of any statistics problem and get instant, step-by-step solutions powered by advanced AI. SCAN ANY STATISTICS PROBLEM • Take a photo or upload from your library • AI analyzes and solves instantly • Step-by-step explanations with formulas • Covers mean, median, mode, standard deviation, z-scores, t-tests, chi-square, ANOVA, regression, probability, distributions & more 24/7 AI TUTOR • Ask any statistics question in plain English • Get personalized explanations at your level • From middle school basics to college stats • Save conversation history for later review ADAPTIVE PRACTICE QUIZZES • AI-generated questions on 11 statistics topics • Choose difficulty: Easy, Medium, Hard • Multiple choice, short answer, true/false • Smart spaced repetition for better retention • Track your progress and daily streak FLASHCARD SYSTEM • 12 pre-built decks covering all major topics • Create custom decks with AI assistance • Study modes: All Cards, Due Only, New, Favorites • SM-2 algorithm optimizes your learning QUICK REFERENCE CHEAT SHEET • Comprehensive formula library • Pin your most-used formulas • Add custom notes and equations • Search by topic or keyword BUILT-IN CALCULATORS • Z-Score & Standard Deviation • Confidence Intervals • Hypothesis Testing (z-test, t-test) • Regression Analysis • See step-by-step calculation breakdowns WHO IT'S FOR • Middle & high school students learning statistics • College students tackling intro to stats • AP Statistics exam preparation • Anyone needing homework help or test prep • Teachers looking for teaching aids TOPICS COVERED Descriptive Statistics - Probability Theory - Normal Distribution - Hypothesis Testing - Confidence Intervals - T-Tests & Z-Tests - Chi-Square Tests - ANOVA - Regression Analysis - Correlation - Sampling Methods - Bayesian Statistics - Time Series WHY CHOOSE STATISTICS AI? - Instant solutions to complex problems - Learn at your own pace with adaptive difficulty - No more waiting for office hours - Beautiful, intuitive interface - Progress tracking and achievements - Syncs across all your Apple devices - Customizable themes Try 2 problem scans for free, plus limited access to all features. Upgrade to Premium for unlimited problem solving, AI tutoring, quizzes, flashcards, and more. Your learning data stays private. We use CloudKit for secure sync and never share your personal information. Download Statistics AI today and transform the way you learn statistics.

Screenshots

Quick Correlation Coefficients3 screens
Statistics AI4 screens

Verdict

The call

The clearest difference is in-app purchases: Quick Correlation Coefficients at none against Statistics AI's 2. Quick Correlation Coefficients also leads on iOS requirement (12.3 vs 18.6). Statistics AI's advantage is update cadence (every 2 months vs every 4 months). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Statistics AI sells 2 in-app purchases, starting at $3.99 per 7 days. Quick Correlation Coefficients asks for nothing beyond the download.

UpkeepUpdate frequency

Quick Correlation Coefficients ships an update every 4 months, Statistics AI every 2 months. The most recent releases landed on October 6, 2026 and September 30, 2026 respectively.

Scorecard3 real differences · 7 level
Quick Correlation Coefficients versus Statistics AI: the parameters behind the verdict, then further details
ParameterQuick Correlation CoefficientsStatistics AI
PriceFreeFree
Rating1.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPod — betteriPhone
Requires iOS12.3 — better18.6
Further details — not scored
Size1 MB22 MB
Age rating4+4+
DeveloperMSYappsIdeas All Day Ltd.

In-app purchases

None

Quick Correlation Coefficients

No in-app purchases

2 purchases

Statistics AI

Subscriptions2
  • Weekly access3 Days trial$3.997 Days
  • Yearly access$29.991 Year

Questions

Is Quick Correlation Coefficients free?
Quick Correlation Coefficients is free to download, with no in-app purchases.
Is Statistics AI free?
Statistics AI is free to download, with in-app purchases available.
Do Quick Correlation Coefficients or Statistics AI have ads?
Neither Quick Correlation Coefficients nor Statistics AI shows ads.
Which is updated more often, Quick Correlation Coefficients or Statistics AI?
Quick Correlation Coefficients ships an update every 4 months, and Statistics AI every 2 months. Most recently, Quick Correlation Coefficients was updated on October 6, 2026 and Statistics AI on September 30, 2026.

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