Calctan vs NotePure
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
NotePure
Capture inspirations and tasks with a minimalist digital notepad. This app offers a clean interface for efficient note-taking and management, with secure data storage and a comfortable dark mode option.
- Minimalist note-taking interface
- Efficient task recording
- Secure data storage
- Dark mode support
- Intuitive design
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In the hustle and bustle of daily life and work, we often seek a simple and intuitive way to capture sudden inspirations and essential tasks. NotePure is born out of this necessity, offering a minimalist note-taking experience that helps users efficiently record and manage notes. We believe that the best tools should be transparent, allowing users to focus on what matters most — recording and thinking, not navigating through complex features. NotePure boasts a clean and straightforward interface, devoid of unnecessary frills, where every detail is designed to enhance the writing and reading experience. Whether it's quickly jotting down meeting points, organizing daily tasks, or capturing life's fleeting moments, NotePure handles it with ease. Understanding the importance of data, NotePure provides a stable and secure data storage solution, ensuring every note is safely kept. It also supports dark mode, offering a comfortable reading and writing environment, day or night. Choose NotePure to enjoy the pleasure of writing and bring order to your thoughts and life. Simple and reliable, NotePure is the ideal note-taking companion for you.
Screenshots
Verdict
The clearest difference is review sentiment: NotePure at 100% against Calctan's 29%. NotePure also leads on rating (5.0 vs 4.5) and in-app purchases (none vs 1). Calctan's advantage is price (Free vs $0.99) and ratings volume (61 vs 1). On device support and iOS requirement 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
Calctan is free to download; NotePure costs $0.99 up front. Calctan sells 1 one-off in-app purchase. NotePure asks for nothing beyond the download.
NotePure holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Calctan has 61 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 29% of Calctan's written reviews are positive against 100% of NotePure's.
Calctan ships an update every 3 months, NotePure every 2 weeks. The most recent releases landed on September 25, 2026 and October 6, 2026 respectively.
| Parameter | Calctan | NotePure |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.5 (61 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 28.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 61 — better | 1 |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 11 MB | 3 MB |
| Age rating | 4+ | 17+ |
| Developer | Jorge Lozada | Fang Yu |
Customer experience
Calctan
NotePure
In-app purchases
Calctan
- No Ads$9.99
NotePure
No in-app purchases








