Comparison

Draw vs Calctan

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

Head to head
About

Draw

This application allows users to create drawings using digital tools. It provides a platform for users to produce pictures, patterns, or diagrams with a digital pencil or pen.

Highlights
  • Digital drawing
  • Pencil and pen tools
  • Create pictures
  • Produce patterns
  • Make diagrams
Features
Read full description

When you draw, or when you draw something, you use a pencil or pen to produce a picture, pattern, or diagram.

About

Calctan

This sophisticated calculator app offers a minimalist design with advanced mathematical functions and extensive personalization options. It seamlessly syncs across devices and includes multitasking features for enhanced productivity.

Highlights
  • Intuitive minimalist design
  • 100+ customizable themes
  • 47 advanced mathematical functions
  • Automatic calculation history
  • iCloud sync across devices
  • Split Screen and Swipe Mode multitasking
  • Share calculations easily
Features
Read full description

Calctan is a sophisticated calculator app designed for iOS devices (iPhone and iPad), celebrated for its elegant, minimalist design and robust functionality that surpasses traditional calculators. Tailored for students, professionals in mathematics, physics, engineering, and anyone seeking a highly customizable and intuitive calculation tool, Calctan combines advanced mathematical capabilities with a seamless user experience. Its sleek interface and extensive personalization options make it both a practical tool and a visually appealing addition to your device. The app’s commitment to user-centric design is evident in its seamless integration with iOS ecosystems. With iCloud sync, your calculations and preferences are always up-to-date, whether you’re switching between devices or collaborating on the go. Features like Split Screen and Swipe Mode empower iPad users to maximize productivity, while the ability to share calculations fosters effortless communication. Calctan is more than a calculator—it’s a dynamic, adaptable tool that elevates your calculation experience with style, precision, and efficiency. Key Features: 1. Intuitive Design: Calctan’s clean, minimalistic interface prioritizes usability, presenting essential calculator elements in a clear, distraction-free layout that ensures effortless navigation and operation. 2. Personalized Interface: Choose from 100 pre-installed themes or craft a unique look with a custom color picker. Fine-tune button corner radius, spacing, and layout to optimize comfort and readability, allowing the app to reflect your personal style. 3. Advanced Math: Access 47 powerful functions, including trigonometric operations (sine, cosine, tangent, and their inverses), percentages for budgeting, exponents, logarithms (base-10, natural, base-2), and roots (square, cube). Switch between degrees and radians, compute factorials for permutations, or use absolute values and reciprocals—perfect for scientific, technical, and financial calculations. 4. Calculation History: Automatically saves and organizes your calculations, enabling you to revisit, edit, or reuse past results with ease, streamlining complex workflows. 5. iCloud Sync: Seamlessly syncs calculations and customizations across your iPhone and iPad, ensuring a consistent and cohesive experience across all your devices. 6. Multitasking Modes: - Split Screen Mode: On iPad, use Calctan alongside another app, such as performing calculations while referencing a document or spreadsheet. - Swipe Mode: Access a second app at the bottom of the screen while keeping Calctan active at the top, enhancing productivity for multitasking users. 7. Share Calculations: Share results effortlessly via email, text, or other apps, making collaboration and communication quick and convenient. Additional Highlights: • Library of basic mathematical constants • Random color theme generator for creative inspiration • Engaging sounds and animations for a dynamic user experience • Adjustable decimal places, currency symbols, and thousands separators • Dark Mode support for comfortable use in low-light environments • Comprehensive settings menu for full control over app preferences • Detailed user manual for easy onboarding and reference

Screenshots

Draw1 screens
Calctan4 screens

Verdict

The call

The clearest difference is rating: Calctan at 4.5 against Draw's 2.2. Calctan also leads on ratings volume (61 vs 5). Draw's advantage is ads (none vs shown) and update cadence (every 6 weeks vs every 3 months). On price, review sentiment, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Draw sells 3 one-off in-app purchases and Calctan sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Calctan holds the better App Store score, 4.5 against 2.2. That said, the two scores are not equally well evidenced: Calctan has 61 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 26% of Draw's written reviews are positive against 29% of Calctan's.

UpkeepUpdate frequency

Draw ships an update every 6 weeks, Calctan every 3 months. The most recent releases landed on October 4, 2026 and September 25, 2026 respectively.

Scorecard5 real differences · 5 level
Draw versus Calctan: the parameters behind the verdict, then further details
ParameterDrawCalctan
PriceFreeFree
Rating2.2 (5 ratings)4.5 (61 ratings) — better
Positive reviews25.7% of reviews28.6% of reviews — better
Number of ratings561 — better
Update frequencyEvery 6 weeks — betterEvery 3 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS6.0 — better16.6
Further details — not scored
Size15 MB11 MB
Age rating4+4+
DeveloperOrgajja Co LtdJorge Lozada

Customer experience

Draw

All ratings5 ratings
Positive40.0%
Neutral0.0%
Negative60.0%
Written reviews105 reviews
Positive25.7%
Neutral7.6%
Negative66.7%

Calctan

All ratings61 ratings
Positive88.5%
Neutral0.0%
Negative11.5%
Written reviews7 reviews
Positive28.6%
Neutral0.0%
Negative71.4%

Bugs and requests

Draw

Reported bugs

10 issues
  • App crashes frequently during use
  • Won't open or start properly
  • Saved drawings appear blank or mirrored
  • Doesn't work without WiFi/internet connection
  • Drawing stops working after clearing screen
Show 5 more
  • Ads cause accidental app store redirects
  • Flashing ads that could trigger seizures
  • App freezes when opening menus
  • Lines are not smooth or accurate
  • Background images display incorrectly

Requested features

10 requests
  • Remove or reduce advertisements
  • Add erase/undo functionality
  • Add more color options (yellow, white)
  • Implement reliable save/load feature
  • Add help documentation and instructions
Show 5 more
  • Improve line smoothness
  • Add more pen styles and brushes
  • Support offline functionality
  • Add back button for navigation
  • Portrait orientation support

Calctan

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Draw

One-time3
  • Small DrawPoint$0.99
  • Upgrade$1.99
  • Big DrawPoint$2.99
1 purchases

Calctan

One-time1
  • No Ads$9.99

Questions

Is Draw free?
Draw is free to download, with in-app purchases available.
Is Calctan free?
Calctan is free to download, with in-app purchases available.
Which has better reviews, Draw or Calctan?
Calctan is rated higher. Draw averages 2.2 out of 5 from 5 ratings, while Calctan averages 4.5 from 61 ratings.
Do Draw or Calctan have ads?
Calctan shows ads; Draw does not.
Which is updated more often, Draw or Calctan?
Draw ships an update every 6 weeks, and Calctan every 3 months. Most recently, Draw was updated on October 4, 2026 and Calctan on September 25, 2026.

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