Art of Stat vs DefineTestTerms
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Art of Stat
Explore statistical methods for analyzing categorical and quantitative data. Generate various charts and plots, including interactive scatterplots, and utilize a built-in data editor. Import your own data or use preloaded examples.
- Descriptive statistics
- Categorical and quantitative data analysis
- Bar, pie, histogram, and box plots
- Interactive scatterplots
- Contingency tables
- Data import (CSV)
- Built-in data editor
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News: The Explore Data app is now part of the all new Art of Stat app, which contains this and seven other modules. Please consider getting the Art of Stat app for the latest updates and features: https://apps.apple.com/us/app/art-of-stat/id6755374228 ------ The Art of Stat: Explore Data app includes statistical methods for exploring categorical and quantitative data. Obtain summary statistics, contingency tables or correlation coefficients and easily generate bar- and pie charts, histograms, boxplots (including side-by-side boxplots), dotplots or interactive scatterplots that let you color dots by a third variable. Several example datasets are preloaded for you to explore (including instructions on the statistical analysis), but you can also enter your own data or import a CSV file from a cloud account. The following methods are implemented: - Analyzing One Categorical Variable - Comparing Groups on a Categorical Variable - Analyzing the Relationship Between Two Categorical Variables - Analyzing One Quantitative Variable - Comparing Groups on a Quantitative Variable - Analyzing the Relationship Between Two Quantitative Variables (Linear Regression) The app provides: - Frequency tables and bar and pie charts for exploring one categorical variable. - Contingency tables, conditional proportions and side-by-side or stacked bar charts for exploring a categorical variable across several groups or the association between two categorical variables. - Mean, standard deviation and the 5-number summary together with histograms, boxplots and dotplots to explore a quantitative variable. - Side-by-side boxplots, stacked histograms or density plots for comparing a quantitative variable across several groups. - Interactive scatterplots with regression lines to analyze the relationship between two quantitative variables. Correlation statistics and linear regression parameters and predictions. Plots of raw and studentized residuals. The app comes with several example datasets preloaded, which you can directly open in the app to explore the app's various features. You can also type in your own data or upload your own CSV file (which any spreadsheet program can create) and select variables from it. Finally the app includes a basic spreadsheet program called Data Editor to create and edit data. You can also copy & paste data from a spreadsheet app such as Google Sheets, Excel or Apple’s Numbers app. Several sample datasets are provided.
DefineTestTerms
Access a comprehensive glossary of assessment terms for quick definitions. This app is beneficial for understanding general and technical terms while reading reports, attending lectures, or engaging in various educational tasks.
- Comprehensive glossary of assessment terms
- Definitions for general and technical terms
- Quick access to definitions
- Beneficial for educational tasks
- Accessible on iPhone and iPad
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The National Association of Assessment Directors (NAAD) and ESP Solutions Group have worked together to create an app at your fingertips where you can access a comprehensive glossary/dictionary of assessment terms for quick definitions. The app includes both general and technical terms and is beneficial while reading a school report, attending a lecture, viewing a video, participating in a Zoom meeting, writing a document, nuancing a meaning, composing an assessment, or engaging in any one of many other tasks.
Screenshots
Verdict
The clearest difference is in-app purchases: DefineTestTerms at none against Art of Stat's 1. DefineTestTerms also leads on iOS requirement (11.0 vs 15.1). Art of Stat's advantage is update cadence (every 6 months vs every 20 months) and ratings volume (24 vs 1). On price, rating, ads and monetization model 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. Art of Stat sells 1 one-off in-app purchase. DefineTestTerms asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.9 for Art of Stat against 5.0 for DefineTestTerms. That said, the two scores are not equally well evidenced: Art of Stat has 24 ratings behind it against 1, so its average is the more settled of the two.
Art of Stat ships an update every 6 months, DefineTestTerms every 20 months. The most recent releases landed on November 3, 2026 and October 13, 2026 respectively.
| Parameter | Art of Stat | DefineTestTerms |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (24 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 24 — better | 1 |
| Update frequency | Every 6 months — better | Every 20 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 11.0 — better |
| Further details — not scored | ||
| Size | 30 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Bernhard Klingenberg | ESP Solutions Group, Inc. |
Customer experience
Art of Stat
DefineTestTerms
In-app purchases
Art of Stat
- Unlock Entire Explore Data app$3.99
DefineTestTerms
No in-app purchases
Questions
Is Art of Stat free?
Is DefineTestTerms free?
Which has better reviews, Art of Stat or DefineTestTerms?
Do Art of Stat or DefineTestTerms have ads?
Which is updated more often, Art of Stat or DefineTestTerms?
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