DayCalc Pro vs Calctan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DayCalc Pro
This app combines a powerful calculator with a comprehensive unit converter. It offers standard and scientific calculations, allows notes to be added to history, and supports a wide range of units and custom conversions. Enjoy a user-friendly interface with customizable themes and watchOS integration.
- Standard and scientific calculator
- Add notes to calculations
- Over 600 units in 20 categories
- Custom unit creation
- Automatic currency exchange rate updates
- Dark Mode support
- Apple Watch integration
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DayCalc is an easy to use, beautifully packaged calculator and Unit Converter, includes standard, scientific and fractions calculator, best calculator for your iPad, iPhone and Apple Watch! Calculator: - Live voice calculator - Add notes to history of your calculations, and you can share - Choose between a basic calculator or scientific calculator with more than 30 scientific operations - Use both calculators in portrait or landscape mode (both iPhone and iPad), and split screen support for iPad - Auto adjust height of the history list, no matter how long the calculation process can be displayed in full - Allows locking of calculation history, cannot be deleted and modified after locking - Full watchOS 4 and later support - Support iOS 9 and later spotlight search - Support Dark Mode Unit Converter: - Over 600+ units in 20 categories. - Allows you to add your own unit data, make your own unit converter that meets all your requirements. - Support more than 150 kinds of currency, conversion exchange rate automatic updates - The simplest way to create and use favorite lists. - Add the constant value of your frequently used, it can easily and quickly reused. - Flexible search feature that lets you quickly find what you want the unit and automatically saves your search history. Basic functions: - 50+ beautiful themes for you to choose - View and edit a history of your calculations on the History Panel - Multiple Button sounds, and button sound is mutable URL schemes: HCDayCalcPro:// Download it now and feel of this calculator is how classic
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
Screenshots
Verdict
DayCalc Pro and Calctan both sit at 4.6 stars, but that hides the real split: 86% of DayCalc Pro's written reviews are positive against 29% of Calctan's. DayCalc Pro also leads on ads (none vs shown) and update cadence (every 6 weeks vs every 3 months). Calctan's advantage is price (Free vs $0.99). On rating, ratings volume, 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
Calctan is free to download; DayCalc Pro costs $0.99 up front. DayCalc Pro sells 9 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.
On the App Store both sit at effectively the same score — 4.6 for DayCalc Pro against 4.5 for Calctan. Both are backed by a comparable volume of ratings — 176 and 61 respectively. Written reviews are what separate them: 86% of DayCalc Pro's written reviews are positive against 29% of Calctan's.
DayCalc Pro ships an update every 6 weeks, Calctan every 3 months. The most recent releases landed on September 24, 2026 and September 25, 2026 respectively.
| Parameter | DayCalc Pro | Calctan |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.6 (176 ratings) — better | 4.5 (61 ratings) |
| Positive reviews | 85.6% of reviews — better | 28.6% of reviews |
| Number of ratings | 176 — better | 61 |
| Update frequency | Every 6 weeks — better | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 99 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | 良峰 侯 | Jorge Lozada |
Customer experience
DayCalc Pro
Calctan
Bugs and requests
DayCalc Pro
Reported bugs
10 issues- Latest update stuck on download/installation loop
- Display rendering issues in landscape mode on iPhone 12/13 mini
- Fraction results display truncated with large numbers
- Fraction operator placement incorrect during multi-step calculations
- Currency conversion broken after favoriting currencies
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- Copy expression only copies first number
- Exponent calculation: .35 / 1 EE 6 returns 350,000 instead of correct value
- Fahrenheit to Celsius conversion inaccurate (8°F returns 1.3°C)
- App becomes unusable after using unit conversion feature
- iOS 6 compatibility: black display and crashes
Requested features
5 requests- Cursor movement for easier digit and symbol editing
- Back button to delete individual numbers instead of clearing all
- History display directly above input without clicking
- Back button in converter functions for easier navigation
- Improved animated transitions for better aesthetics
Calctan
Not enough reviews yet to summarise bugs or requests.
In-app purchases
DayCalc Pro
- Constants Pack$0.99
- Festivals Theme Pack 1$0.99
- Season Theme Pack 1$0.99
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- Bird Theme Pack 1$0.99
- Insects Theme Pack 1$0.99
- Season Theme Pack 2$0.99
- Festivals Theme Pack 2$0.99
- Custom Unit Pack$1.99
- Complete Pack$4.99
Calctan
- No Ads$9.99









