DataAnalysis vs Essayist
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DataAnalysis
This iPad app allows users to plot and fit various types of data using curve fitting, value prediction, and kinetic analysis. Data can be imported or entered manually, with options for preprocessing before plotting and customization of graphs. It supports multiple fitting methods and can generate standard curves for unknowns.
- Plotting and fitting of x,y data
- Data import (txt, csv, clipboard)
- Data preprocessing (average, normalize)
- Customizable graph generation
- Non-linear regression fitting
- Standard curve generation
- Export graphics and text (PDF, PNG, CSV, TXT)
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DataAnalysis is a general purpose iPad App for the plotting and fitting of all types of data that can be formulated as x, y pairs. The program can be easily used by both students and professionals. It is particularly useful for quick analyses of various types of data by curve fitting, value prediction via a standard curve, and analysis of kinetic data including enzyme kinetics. Data can be entered directly via the keyboard or imported from a text file (.txt), or a comma separated value file (.csv). In addition, data can be pasted from the clipboard. After data entry the user has the option to average, baseline correct, and/or normalize the data before plotting and fitting. Plotting of the data is as simple as pressing the Plot button. The axes are autoscaled and the graph is immediately ready to add to a document or presentation. The user has a variety of options to customize the graph by altering the axes, axes labels, graph title, and changing the symbol, its size and color. Using touch and drag the user can create a selection box allowing the creation of a data subset. Once the data subset has been selected the user has two options: (1) To zoom in on the selected data. Any fitting done in this mode is global (e.g. uses all the data). (2) To zoom and perform a fitting only on the selected subset of the data. The data can be fit to a variety of mathematical equations by non-linear regression including simple functions such as linear, 2nd and 3th order polynomials, power, exponential, and log functions. Data can also be fit to more complex equations for such processes as radioactive decay, enzyme kinetics, 1st and 2nd order chemical reactions, as well as gaussian, logistics and surge functions. The fit can be overlaid on the data with different line widths, types and thicknesses. Lowess Regression (LOcal Weighted regrESSion) can also be used to fit data without the need to specify a mathematical function. Not only does Lowess Regression not require a mathematical function, but also does not require parameters (non-parametric). This fitting method is used extensively to fit everything from election polling to astrophysics data, where the data have a large degree of scatter. For many analytical situations, the data fit can be used as a standard curve to determine the value of unknowns. This analytical procedure is completely automated within DataAnalysis. The program output, graphics and text, can be copied, emailed, or uploaded to cloud storage such as iCloud, Dropbox, Box and OneDrive in a variety of formats including PDF, PNG, CSV and TXT. The graphics in PDF format can be edited with programs like Adobe Illustrator™ and AutoDesk Graphic™ as objects. DataAnalysis also supports multitasking and printing of input data as well as all forms of output. DataAnalysis has built in tool tips, a comprehensive web based User Guide and videos tutorials all available via the Help Menu.
Essayist
This app simplifies academic writing by automatically formatting essays in various styles like APA, MLA, and Chicago. It includes a universal reference manager, citation tools, and equation support, allowing for distraction-free writing and easy export to PDF or Word.
- Automatic essay formatting
- Universal reference manager
- In-text citation and footnote insertion
- LaTeX equation support
- Export to PDF and Word
- Minimalist interface
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Try Essayist for free today! "Mac App of the Year 2025" — Apple "App of the Day" — Apple "Editors' Choice" — Apple "A-Plus Apps for Students" — Apple "Mac Essentials" — Apple No more fighting margins, hanging indents, or citation formatting. Essayist streamlines academic writing so you can concentrate on your ideas while it takes care of formatting, citations, references, footnotes, page setup, and more. AUTOMATIC FORMATTING Essayist automatically formats margins, fonts, spacing, headings, page numbers, references, citations, footnotes, figures, tables, and other essential elements. UNIVERSAL REFERENCE MANAGER Store and organize references with iCloud, then use them across multiple essays. Add sources through built-in search, Google Scholar, URLs, BibTeX, or manual entry. Essayist formats each source and adds it to your references or works cited list automatically. ZOTERO IMPORT Import your Zotero references and start using them in Essayist. CITATIONS Quickly insert in-text citations, footnotes, and endnotes with the click of a button. CITATION STYLES Choose from APA, MLA, Chicago/Turabian, Harvard, IEEE, AMA, Vancouver, and more than 10,000 other styles. EQUATIONS Add equations using LaTeX. FIGURES & TABLES Insert fully formatted figures and tables with captions, numbering, titles, and notes. Cross-reference them throughout your essay. ABSTRACT, APPENDICES & TABLE OF CONTENTS Easily add an abstract, appendices, and an automatically generated table of contents. WRITE ANYWHERE, STAY IN SYNC Your essays and references sync across iPhone, iPad, and Mac with iCloud, so you can start on one device and finish on another — even offline. YOUR WORK IS YOURS No ads, no selling your data, no lock-in — export anytime as PDF or Word. EXPORT Export your essays as PDF or Word documents. MINIMAL INTERFACE Write in a clean, distraction-free workspace with customizable themes, backgrounds, and dark mode. MORE • Available on iPhone, iPad, and Mac with universal purchase • US Letter and A4 paper sizes • Times New Roman and Arial fonts • Word and page counts • Spell check, auto-completion, and auto-capitalization • Accessibility support REGULAR UPDATES Have a feature request or found an issue? Contact us at contact@essayist.app. PRICING Essayist is free to download and includes a free trial of Essayist Pro. Pro is available as a monthly or yearly subscription. Terms of Use: https://www.iubenda.com/terms-and-conditions/82031685 Privacy Policy: https://www.iubenda.com/privacy-policy/82031685
Screenshots
Verdict
The clearest difference is in-app purchases: DataAnalysis at none against Essayist's 4. DataAnalysis also leads on iOS requirement (14.0 vs 18.0). Essayist's advantage is rating (4.5 vs 4.1) and update cadence (fortnightly vs every 2 months). On price, review sentiment and ads 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. Essayist sells 4 in-app purchases, starting at $5.99 per month. DataAnalysis asks for nothing beyond the download.
Essayist holds the better App Store score, 4.5 against 4.1. Both are backed by a comparable volume of ratings — 106 and 428 respectively. Written reviews complicate that: 64% of DataAnalysis's written reviews are positive against 61% of Essayist's, so the app with the better star average is not the one people write more warmly about.
DataAnalysis ships an update every 2 months, Essayist fortnightly. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.
| Parameter | DataAnalysis | Essayist |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (106 ratings) | 4.5 (428 ratings) — better |
| Positive reviews | 64.2% of reviews — better | 60.5% of reviews |
| Number of ratings | 106 | 428 — better |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid — better | Subscription |
| Devices | iPad | iPhone, iPad, Mac — better |
| Requires iOS | 14.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 26 MB | 82 MB |
| Age rating | 4+ | 4+ |
| Developer | Data Evaluation Systems | Essayist Software Inc. |
Customer experience
DataAnalysis
Essayist
User reviews
DataAnalysis
From 106 App Store ratingsWhat we love
- 👍 Useful for plotting data
- 👍 Good for quick graphs
- 👍 Accurate results
- 👍 Clearly plots points
- 👍 Shows y-intercept and gradient
Room to improve
- 🐛 App crashes
- 🐛 Not working at all
- 🐛 Hangs up
- 🐛 UI/UX poorly made
- 🐛 Tacky UI
Essayist
From 428 App Store ratingsWhat we love
- 🚀 Easy to use
- 👍 Helpful for academic writing
- 🚀 Saves time on formatting
- 👍 Accurate citations
- 👍 Intuitive interface
Room to improve
- 🐛 Bugs and crashes
- 💰 Expensive subscription
- 🔒 Privacy concerns
- 🔒 Locked features behind paywall
- 🔧 Limited functionality
Bugs and requests
DataAnalysis
Reported bugs
39 issues- App will not let import .csv files
- No option to import a csv file or to paste data from the clipboard
- Support page not working
- Font and background color is white, unable to make out input
- Forcing users to use Dropbox or mail app for import
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- iPad only supports vertical display
- Update failed, app hangs up
- App not working at all, closes when plotting data
- Crashes on iPad 2
- App crashes when trying to launch
- Difficulty using app in portrait mode on iPad
- App respects landscape mode when iPad is oriented landscape
- Extrapolation is a pain, negative y values are non-numerical
- App has no automatic re-scaling function
- Data beyond original data is off the graph
- Cannot use as a standard curve without extrapolation
- Developer website forces to manual, no contact info
- App crashes with larger amounts of data (1000 x and y)
- Graph attributes not saved
- File names not saved
- App crashes on import of csv file
- App crashed and required iPad restart
- App crashes when trying to launch on iPad 2
- App crashes with large data sets
- App does not save graph attributes or file names
- App does not work properly, help is not working
- Sometimes does not start properly
- App crashes on import of CSV files
- App crashes when trying to launch
- App crashes with large data amounts
- Graph attributes and file names are not saved
- App does not work properly, help is not working
- App does not start properly sometimes
- App crashes on CSV import
- App crashes on launch
- App crashes with large data sets
- Graph attributes and file names are not saved
- App does not work properly, help is not working
- App does not start properly sometimes
Requested features
34 requests- Import .csv files
- Paste data from clipboard
- Font color format option
- Generate 1/x^2 from x set
- Multiple y-axes
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- Landscape mode
- Analyze and model several curves on the same graph
- Log scales available
- Gridlines (major and minor)
- User-defined function capabilities
- Create own functions
- Log log plot
- Custom function for fitting
- iPhone compatibility
- Double-Y plot
- Data tables
- Title in the graph
- Open In for PDF
- Save graph with fit and equation as PDF
- Normalize x-axis
- Remember previous entries for functions
- Default test values to previously used
- Standard curve analysis for all functions
- Set x and y axis range
- Extrapolate to values beyond entered data
- Error bars
- Multi-column data
- Weighted fitting
- Import text file from Dropbox
- More than one line per graph
- Logarithmic graph
- Polynomials of degree 4 or higher
- Lorentzian function
- Arbitrary function fitting
Essayist
Reported bugs
5 issues- App crashes when trying to add references
- Formatting issues when copying and pasting
- Inability to edit title pages and section headings
- Inconsistent behavior across devices (iPad vs. Mac)
- Issues with in-text citations and reference lists
Requested features
6 requests- Add more citation styles (e.g. MHRA, Vancouver)
- Improve table and image handling
- Integrate with reference managers like Zotero
- Add grammar and spell check tools
- Allow more customization of templates and formatting
Show 1 moreShow fewer
- Improve export functionality to preserve formatting
In-app purchases
DataAnalysis
No in-app purchases
Essayist
- Monthly Subscription3 Days trial$5.991 Month
- Monthly Subscription3 Days trial$9.991 Month
- Yearly Subscription7 Days trial$39.991 Year
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- Yearly Subscription7 Days trial$79.991 Year









