DataAnalysis vs LiquidText
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.
LiquidText
This app provides a dynamic workspace for reviewing and organizing information from documents and webpages. It allows users to extract key facts, connect ideas across different sources, and annotate content for research, writing, or study.
- Import documents and webpages
- Extract and organize excerpts
- Connect ideas with ink links
- Compare document sections
- Annotate PDFs, Word, and PowerPoint
- Search across all documents
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*** Named “Most Innovative iPad App of the Year” by Apple App Store *** LiquidText offers a fast, natural way to review, gather, and organize information across all your documents and webpages—then apply the results to writing reports, meeting prep, or simply studying. Pull out key facts and connect them together, squeeze a document to compare sections, draw a line to connect ideas in different documents, comment on multiple pages at once, build upon your thoughts, and much more. ► WHAT PEOPLE ARE SAYING: * "If you want to experience the power of going beyond paper, you can download LiquidText" – Cult of Mac * One of Macworld’s Top 24 Apps for iPad Pro * One of Time Magazine's Ten Best apps for iPad Pro * * "There's a better way to organize your research, and the app is it." – iMore, Serenity Caldwell * “All you need for deep research projects.” – Macworld, Jackie Dove * "The world changed with...LiquidText" – Law360, Paul Kiesel * "LiquidText may just be *the* app for reviewing and annotating PDFs using Apple's tablet and stylus." – CIO Magazine, James Martin * “One of the most powerful, original iPad apps I've tried in years” – Federico Viticci, MacStories.net ► LIQUIDTEXT’S COMPLETE FEATURE SET INCLUDES: (Features with * require a paid upgrade.) Import • Create a workspace and import all the documents and web pages you need • Compatible with PDF, Word, and PowerPoint document types • Import from Dropbox, iCloud Drive, Box, email, and more • Import content from webpage or send to LiquidText directly from Safari • Instant OCR to select text in scanned documents; do a full document-OCR to search as well!* • Import documents & metadata directly from reference managers (supports Zotero and Mendeley)* Interact • Pull excerpts from all the documents in your project into the Workspace area • Add your own notes (typed or written) to the Workspace area • Freely draw on your notes, or on the workspace itself* • Organize excerpts and notes into groups • Connect anything - draw live “ink links” that span pages, documents, notes, and more* • Create mind-maps by drawing “ink links” connecting your excerpts/notes to one another * • Get context - tap notes and excerpts to find original source Compare • Pinch a document to compare different distant pages side by side • Collapse text to see annotated parts side-by-side • Collapse text to view search results(s) side-by-side • Import unlimited number of documents into a project, view up to 3 at once* Annotate • Freely draw* or highlight on your document, notes, or the workspace itself • Add margin notes/comments to text, images, notes, and excerpts • Comment on two or more selections simultaneously • Replace document with a newer version (and annotations are brought to new doc)* Search • Search for keywords across all your LiquidText documents • Find keywords in title or text of your documents* • Bulk highlight, tag, or link to your search results* Realtime Collaboration • Invite colleagues into your shared projects and work together in near realtime* • Leave comments and notifications for your collaborators* • Privacy controls: set whether each workspace & document in your project is shared or private* Easy Export • Export your project as a PDF (includes your Workspace and documents) • Export your project as a Word file (converts your notes/excerpts into a linear document) • Send a full LiquidText file for those with the app. • Send files by email or to Dropbox, iCloud Drive, Zotero, and more* Sync & Backup* • Real-time, cross-platform sync • Continuous cloud backup • Multi-device display: • Use your desktop or tablet as additional display for your other device • Use your tablet for freehand inking while viewing and keyboarding on your desktop See our terms of use at https://www.liquidtext.net/terms-of-use Learn more at LiquidText.net | Better Than Paper
Screenshots
Verdict
The clearest difference is rating: LiquidText at 4.6 against DataAnalysis's 4.1. LiquidText also leads on ratings volume (6.4K vs 106) and update cadence (every 2 weeks vs every 2 months). DataAnalysis's advantage is in-app purchases (none vs 13) and review sentiment (64% vs 50%). On price 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. LiquidText sells 13 in-app purchases, starting at $5.49 per month. DataAnalysis asks for nothing beyond the download.
LiquidText holds the better App Store score, 4.6 against 4.1. That said, the two scores are not equally well evidenced: LiquidText has 6.4K ratings behind it against 106, so its average is the more settled of the two. Written reviews complicate that: 64% of DataAnalysis's written reviews are positive against 50% of LiquidText'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, LiquidText every 2 weeks. The most recent releases landed on September 22, 2026 and October 6, 2026 respectively.
| Parameter | DataAnalysis | LiquidText |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (106 ratings) | 4.6 (6.4K ratings) — better |
| Positive reviews | 64.2% of reviews — better | 49.6% of reviews |
| Number of ratings | 106 | 6.4K — better |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPad | iPhone, iPad, Mac — better |
| Requires iOS | 14.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 26 MB | 317 MB |
| Age rating | 4+ | 17+ |
| Developer | Data Evaluation Systems | LiquidText, Inc. |
Customer experience
DataAnalysis
LiquidText
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
LiquidText
From 6.4K App Store ratingsWhat we love
- 🚀 Powerful annotation and organization features
- 📚 Excellent for academic and research work
- 💡 Innovative concept and workflow
- 🤖 Responsive and helpful customer support
- 🖼️ Smooth integration with Apple Pencil
Room to improve
- 💰 Expensive, especially for the subscription model
- 🐛 Buggy and unstable at times
- 🤯 Steep learning curve and unintuitive interface
- 🔗 Lack of seamless cross-device sync and integration
- 🔍 Navigation and file management issues
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
LiquidText
Reported bugs
5 issues- Frequent crashes and data loss issues
- Inconsistent behavior with Apple Pencil
- Text selection and highlighting problems
- Sync issues between iPad and Mac versions
- Unexpected changes to existing annotations
Requested features
5 requests- Dark mode option
- Improved palm rejection and writing experience
- Better export and sharing options
- Thumbnail/outline view for easier navigation
- Ability to rotate and resize text/image annotations
In-app purchases
DataAnalysis
No in-app purchases
LiquidText
- LiquidText Live, Monthly, Stu7 Days trial$5.491 Month
- LiquidText Live, Monthly, StPr7 Days trial$5.491 Month
- LiquidText Unlimited, Mo, Stu7 Days trial$10.901 Month
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- LiquidText Live, Monthly7 Days trial$10.901 Month
- LiquidText Live, Monthly, Upg7 Days trial$10.901 Month
- LiquidText Unlimited, Yr, Stu7 Days trial$19.001 Month
- LiquidText Live, Yearly, Stu7 Days trial$54.901 Year
- LiquidText Live, Yearly7 Days trial$99.991 Year
- LiquidText Live, Yearly, Upg7 Days trial$99.991 Year
- LiquidText Unlimited, Yr7 Days trial$189.991 Year
- LT Pro - For Students$19.99
- LiquidText Pro$29.99
- LiquidText Pro II$89.99









