DataAnalysis vs QuickNotes X
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.
QuickNotes X
This app offers a fluid and precise note-taking experience with a custom vector ink engine, voice recording synced to writing, and ML-powered shape recognition. Organize notes with notebooks and folders, protect them with passwords and biometrics, and sync seamlessly across devices via iCloud. Mark up PDFs and presentations, and customize your notes with various tools and templates.
- Vector ink engine for fluid writing
- Voice recording synced to notes
- ML-powered shape recognition
- Notebook and folder organization
- Password and biometric protection
- PDF and presentation annotation
- iCloud sync across devices
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ESCAPE THE LIMITS OF PHYSICAL PAPER • Experience a fluid, precise and natural note taking experience powered by the unparalleled performance of QuickNotes X custom vector ink engine; • Choose your drawing style with numerous included tools, such as fountain and ballpoint pen; • Freely customize your stroke color as well as line thickness and pressure sensitivity; • Record and play back lectures with Voice Recording: your writing will be synced to the audio! • Draw perfect shapes and straight lines thanks to automatic, ML-powered shape recognition; • Move, resize, rotate and zoom your handwriting to take notes like a pro; • Never run out of paper: swipe to the next page and a new page will be created if needed! • Take perfect notes with your Apple Pencil, Logitech Crayon or other capacitive styluses. ORGANIZE & PROTECT YOUR THOUGHTS • Never lose your notes again thanks to the powerful organization provided by QuickNotes X; • Create Notebooks to organize your notes; • Add unlimited Folders & Subfolders to group your Notebooks; • Lock individual Notebooks and Folders with a Password to protect your thoughts from prying eyes; • Unlock protected notebooks using Face ID, Touch ID or by entering your Password; • Rearrange your Notebooks and Folders however you like to make sure they are always in the correct order. SEAMLESSLY SYNC TO ALL YOUR DEVICES • Seamlessly back up & sync your notebooks and folders to all your devices thanks to iCloud; • Write once, edit anywhere: when iCloud Sync is active all your content is automatically available on all your devices; • Use the native Mac app to view your notes on the bigger screen and edit them right on your computer. MARK UP & WRITE ON PDFs, SLIDES AND MORE • Import and edit PDFs, PowerPoint presentations more; • Annotate documents on your device with all the tools available, including fountain & ballpoint pen, highlighter and shape recognition; • Open notes and documents side-by-side on your iPad for maximum flexibility; • Quickly export your notes as images, PDF or QuickNotes X Documents for easy sharing ENDLESS CUSTOMIZATION FOR YOUR CREATIVITY • Create an unlimited number of presets for stroke color and line thickness to always have the right one ready at your fingertips; • Choose between Dual or Single Bar Mode to take notes with the maximum level of flexibility and customizability; • Choose to erase entire strokes on only some parts thanks to the new Precision and Whole Stroke Erasers; • Use the Lasso tool to cut, copy, paste or delete groups of strokes or entire pages; • Customize the look of your Notebooks and Folders by choosing from more than 80 options; • Make each notebook cover yours: the Notebook cover is now fully editable so you can draw on it! • Choose the right paper template for your Notebooks, such as Blank Paper, Cornell Paper, Chemistry Paper, Engineering Grid Paper, Music Paper and more! TYPE AND WRITE ANYWHERE • Add Text Boxes anywhere in a page to start typing, with plenty of customization options for color, font style and size, available right at your fingertips in the new Tool Bar; • Move, rotate and scale text boxes to never run out of space; • Combine handwritten notes with typed content and annotate or highlight key words in your Text Boxes; AND THERE IS EVEN MORE! • Swipe left or right to quickly move to the previous or next page in the notebook; • Quickly jump to any page in the Notebook by using the Notes List menu in the Note Editor; • Customize any new page you create thanks to the new "New Page" menu in the Editor; • Create a QuickNotebook to always have a fresh new page when you open the app; • Changing the paper template for a single page or the entire Notebook is only one tap away; QuickNotes X: Note-Taking, Made Easy. Website: https://www.quicknotesx.com Twitter: @QuickNotesX Instagram: @quicknotesx ----------- Privacy Policy: https://www.quicknotesx.com/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Screenshots
Verdict
The clearest difference is in-app purchases: DataAnalysis at none against QuickNotes X's 11. DataAnalysis also leads on review sentiment (64% vs 38%) and iOS requirement (14.0 vs 16.0). QuickNotes X's advantage is ratings volume (3.8K vs 106) and rating (4.3 vs 4.1). On price, update cadence 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. QuickNotes X sells 11 in-app purchases, starting at $0.99 per 3 months. DataAnalysis asks for nothing beyond the download.
QuickNotes X holds the better App Store score, 4.3 against 4.1. That said, the two scores are not equally well evidenced: QuickNotes X has 3.8K 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 38% of QuickNotes X'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, QuickNotes X every 5 weeks. The most recent releases landed on September 22, 2026 and October 4, 2026 respectively.
| Parameter | DataAnalysis | QuickNotes X |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (106 ratings) | 4.3 (3.8K ratings) — better |
| Positive reviews | 64.2% of reviews — better | 38.0% of reviews |
| Number of ratings | 106 | 3.8K — better |
| Update frequency | Every 2 months | Every 5 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 | 16.0 |
| Further details — not scored | ||
| Size | 26 MB | 354 MB |
| Age rating | 4+ | 4+ |
| Developer | Data Evaluation Systems | Alessandro Sassi |
Customer experience
DataAnalysis
QuickNotes X
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
QuickNotes X
From 3.8K App Store ratingsWhat we love
- 💻 Intuitive and easy to use
- 📚 Helpful for organizing notes
- 🎨 Variety of paper templates and pens
- 🔊 Voice recording feature
- ⚡️ Smooth writing experience with Apple Pencil
Room to improve
- 🔒 Limited functionality without paying for pro version
- 🐛 Glitches, crashes, and data loss issues
- 💭 Handwriting can appear blurry or distorted
- 🖋️ Lack of palm rejection when writing
- 📁 Inability to reorder or move pages
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
QuickNotes X
Reported bugs
4 issues- Notes randomly disappearing or becoming corrupted
- Pen input not registering correctly or lagging
- Unexpected page flipping or navigation issues
- Syncing problems between devices
Requested features
5 requests- Add text typing option for those with poor handwriting
- Implement cloud sync and cross-device access
- Include more customization options like templates and colors
- Improve shape recognition and drawing tools
- Allow rearranging and organizing of pages/notebooks
In-app purchases
DataAnalysis
No in-app purchases
QuickNotes X
- Cloud & ML Pack$0.993 Months
- Covers Pack$0.99
- Templates Pack$0.99
- QuickNotes X AI: 50000 Tokens$0.99
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- QuickNotes X AI: 100000 Tokens$1.99
- Notebooks & Folders Pack$2.99
- Tools Pack$2.99
- QuickNotes X AI: 300000 Tokens$3.99
- QuickNotes X Pro$4.99
- Pro Pack$5.99
- QuickNotes X AI: 500000 Tokens$5.99
Questions
Is DataAnalysis free?
Is QuickNotes X free?
Which has better reviews, DataAnalysis or QuickNotes X?
Do DataAnalysis or QuickNotes X have ads?
Which is updated more often, DataAnalysis or QuickNotes X?
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