Comparison

iCalcline vs Inkflow Visual Notebook

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

Head to head
About

iCalcline

This app is a modern algebra calculator for iOS that can solve complex math expressions with variables and functions. It offers a customized keyboard for easy input and displays results instantly. Users can create and manage an unlimited number of variables and constants.

Highlights
  • Evaluates complex algebraic expressions
  • Supports variables and constants
  • Customized keyboard for easy input
  • Instant result display
  • Unlimited variable and constant management
  • Step-by-step solving option
  • High precision calculations
Features
Read full description

iCalcline is a modern algebra calculator for iOS It can solve math expression with any level of parenthesis and functions You can use algebraic expression with numeric values and or variables constant names You can use in expression the variables and constants you created in the internal tables: 'alpha=bravo+K_1' (bravo will be taken from the variable table, K_1 from the const table and alpha will be assigned or created in the variable table) You can create, manipulate, delete and use how many variables you like inside the app. The internal iOS keyboard provides helpers to insert available functions, variables, constants, operators. Result is displayed immediatly. KEY POINTS • Evaluates mathematical expressions with parentheses, nested functions, variables and constants • Easy to use • The user simply inserts an expression and iCalcline displays the result • Variable creation and reference inside expressions are very easy using an interactive list. FEATURES • Algebra made easy and simple • Manages any nested level of parentheses using the correct precedence • Check your expression syntax in advance signaling errors • Can use an internal variable and constant table with editable values • You can manages unlimited numbers of variables and constant you like in the internal tables. • You can use in expression the variables and constants you created in the internal tables: 'alpha=bravo+K_1' (bravo will be taken from the variable table, K_1 from the const table and alpha will be assigned or created in the variable table) • Customized keyboard with Functions, variables table, constants table and frequent used symbols available to insert with a single touch • Can change on the fly calculation precision (up to 9 decimals thanks to use of long double calculation) • Variable font sizes • Select a variable or a value and inserting a function will wrap it inside the function parenthesys • Uses decimal and group separator in accordance with your local settings • Full log of executed calculations • Optional step by step solving showing all the mathematical passages in the log. • Retains values over successive re-launch • DEG° and RAD calculation for trigonometric functions • Based on a custom fast calculation engine and used also on macOS in Calcline and TS Calc (available on the Mac App Store). • Uses long double calculation (High precision with up to 9 decimal digit precision) • Works great in Portrait and Landscape mode • Works great on iPad as SlideOver FACILITIES: • A calculation area where you can insert algebraic expressions and immediatly see the result as you type • A Variable table where you can insert infinite variables with custom values, Variables can be created as result of calculations (x=1+1) will create automatically the variable x inside the table assigning the value = 2 • A constant table with constant value usable in calculations. Off course constant can't be assigned by calculation • A log with all the result , available step by step or in concise format AVAILABLE FUNCTIONS sqrt cbrt sin cos tan asin acos atan sinh cosh tanh asinh acosh atanh log log10 exp, exp2 expm1 abs ceil floor pow

About

Inkflow Visual Notebook

This app offers a fluid digital writing and sketching experience, allowing users to easily capture, resize, and reorganize ideas. It supports high-resolution zooming for detailed work and integrates text, photos, and custom paper backgrounds. Users can share their creations in various formats.

Highlights
  • Fluid digital ink for writing and sketching
  • Resize and reorganize content with touch gestures
  • High-resolution zoom for precision detail
  • Insert text, photos, and custom paper backgrounds
  • Export to PDF, JPEG, and PNG
  • Inkport for scanning real-world notes
Features
Read full description

Inkflow is a note-taking and brainstorming experience unlike any other! Capture your ideas as easily as with pen and paper, then resize and reorganize them with your fingers. DIGITAL WRITING DONE RIGHT Inkflow's ink feels like a really smooth fountain pen. Great for expressive writing or sketching. Effortlessly scale or move anything you select. This will change the way you think about ink: Jot down a list of concepts then rearrange them to fit into the bigger picture. literally move your thoughts around the page, and assemble big ideas with your fingers. This works great for brainstorming and planning. It's also perfect for prototyping layouts, sketching, and drawing. FULL RESOLUTION ZOOM Zoom and pan with two fingers. Inkflow's ink stays sharp no matter how much you zoom in, so you can add fine details at full quality. It's also lightning fast and lag free. This allows writing and drawing with incredible precision, with or without a stylus. TEXT, PHOTOS, and PAPER BACKGROUNDS TOO Insert text boxes and photos anywhere on the page and resize them seamlessly with the ink. You can also choose from a selection of different paper backgrounds. EASILY CREATE and SHARE Inkflow let's you export your books to PDF, high-resolution JPEG, and share them via Twitter, Email, or with other Apps. TRY INKFLOW FOR FREE Rather than just read about Inkflow, go ahead and try it out: We've decided to make the Basic Edition of Inkflow completely FREE. The Basic Edition is a full featured note-taking and sketching app. It comes with the Fountain Pen with black ink, photos, and a standard set of 5 popular fonts for text. Books max out at 20 pages each, but you can create as many as you like. *** NOTE: To delete ink, tap on the selection then tap delete. Tap on the book name to delete a book. If you're looking for more, there is... INKFLOW PLUS Upgrade instantly at any time to the Plus Edition to get: - Inkport - A customizable, full color palette, - Pencil, Eraser, and Paint Brush tools, - The Write-Behind Hilighter tool, - Rotate, Cut, Copy, Paste Ink, and Page Management, - Export as PNG with transparent backgrounds, - Notebooks with unlimited pages, - Custom paper backgrounds, - An additional 50+ fonts, - And more! The Plus Edition lets you do even more things such as: Painting, cartooning, page layouts, and brainstorming in full color. Learn more in the in-App Quickstart Guide. INKPORT: COPY AND PASTE FROM THE REAL WORLD Only Inkflow Plus includes the revolutionary Inkport tool. Inkport uses your iPad's camera to instantly convert your written notes and sketches into Inkflow's native vector ink. Easily pull in materials from multiple sources and go from paper to iPad without missing a beat. Inkport is going to change the way you use paper in your workflow. Universal App for iPad, iPhone and iPod Touch: Upgrade once and get Inkflow Plus on all your compatible devices connected to your iTunes account! EDUCATORS: Inkflow Plus is also available as a standalone App, and qualifies for Apple's Volume Purchase Program. A PLATFORM FOR CREATIVITY We strongly believe that the iPad is not just a consumption device. It's a creativity device. Check out our whole range of creativity Apps on our website. Keep on creating!

Screenshots

iCalcline4 screens
Inkflow Visual Notebook4 screens

Verdict

The call

The clearest difference is review sentiment: Inkflow Visual Notebook at 71% against iCalcline's 0%. Inkflow Visual Notebook also leads on price (Free vs $0.99) and rating (4.6 vs 1.0). iCalcline's advantage is in-app purchases (none vs 1). On 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

Inkflow Visual Notebook is free to download; iCalcline costs $0.99 up front. Inkflow Visual Notebook sells 1 one-off in-app purchase. iCalcline asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Inkflow Visual Notebook holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Inkflow Visual Notebook has 1.9K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of iCalcline's written reviews are positive against 71% of Inkflow Visual Notebook's.

UpkeepUpdate frequency

iCalcline ships an update every 24 months, Inkflow Visual Notebook every 5 months. The most recent releases landed on September 28, 2026 and October 10, 2026 respectively.

Scorecard8 real differences · 2 level
iCalcline versus Inkflow Visual Notebook: the parameters behind the verdict, then further details
ParameteriCalclineInkflow Visual Notebook
Price$0.99Free — better
Rating1.0 (1 ratings)4.6 (1.9K ratings) — better
Positive reviews0.0% of reviews71.2% of reviews — better
Number of ratings11.9K — better
Update frequencyEvery 24 monthsEvery 5 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.612.1 — better
Further details — not scored
Size1 MB42 MB
Age rating4+4+
DeveloperRoberto PanettaQrayon, LLC

Customer experience

iCalcline

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Inkflow Visual Notebook

All ratings1,865 ratings
Positive89.0%
Neutral5.0%
Negative6.0%
Written reviews378 reviews
Positive71.2%
Neutral8.2%
Negative20.6%

Bugs and requests

iCalcline

Not enough reviews yet to summarise bugs or requests.

Inkflow Visual Notebook

Reported bugs

4 issues
  • Frequent crashes and data loss
  • Unreliable auto-save and syncing
  • Compatibility issues with newer devices/OS
  • Pen/input lag and inconsistent responsiveness

Requested features

5 requests
  • Add more pen/brush options and customization
  • Implement layers and advanced drawing tools
  • Improve page management (insert, delete, reorder)
  • Integrate cloud sync and cross-device access
  • Add password protection and locking features

In-app purchases

None

iCalcline

No in-app purchases

1 purchases

Inkflow Visual Notebook

One-time1
  • Inkflow Plus$12.99

Questions

Is iCalcline free?
iCalcline costs $0.99, with no in-app purchases.
Is Inkflow Visual Notebook free?
Inkflow Visual Notebook is free to download, with in-app purchases available.
Which has better reviews, iCalcline or Inkflow Visual Notebook?
Inkflow Visual Notebook is rated higher. iCalcline averages 1.0 out of 5 from 1 ratings, while Inkflow Visual Notebook averages 4.6 from 1.9K ratings.
Do iCalcline or Inkflow Visual Notebook have ads?
Neither iCalcline nor Inkflow Visual Notebook shows ads.
Which is updated more often, iCalcline or Inkflow Visual Notebook?
iCalcline ships an update every 24 months, and Inkflow Visual Notebook every 5 months. Most recently, iCalcline was updated on September 28, 2026 and Inkflow Visual Notebook on October 10, 2026.

Other comparisons