SciCalc82 vs DayCalc Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SciCalc82
Experience a scientific calculator designed with the authentic look and feel of the early 1980s. It offers familiar functions with added modern features for enhanced usability, including realistic key click sounds and an LCD display.
- Authentic 1980s design
- Realistic key click sounds
- LCD display simulation
- Familiar functions
- Modern usability enhancements
- Quick help guide
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Simple Scientific Calculator adhering to the style of the early 1980s. Easy to use and familiar for those of us from that era. Adds a touch of realism in look and feel, layout, key click sounds, LCD display digits and response. Functions and operations are as you're used to, but adds a few more features that you'd wished you'd had back then, to give you a modern day usable device. Quick Help: • Green [INV] button (upper left) is the "shift" or "2nd" function button. • Press and hold the blue [MODE] (HELP) button for web-based help.
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
Screenshots
Verdict
The clearest difference is price: SciCalc82 at Free against DayCalc Pro's $0.99. SciCalc82 also leads on in-app purchases (none vs 9) and iOS requirement (8.0 vs 15.0). DayCalc Pro's advantage is ratings volume (180 vs 19). On rating, review sentiment, 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
SciCalc82 is free to download; DayCalc Pro costs $0.99 up front. DayCalc Pro sells 9 one-off in-app purchases. SciCalc82 asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.6 for SciCalc82 against 4.6 for DayCalc Pro. That said, the two scores are not equally well evidenced: DayCalc Pro has 180 ratings behind it against 19, so its average is the more settled of the two. Written reviews split almost evenly too, at 86% and 86% positive.
SciCalc82 ships an update every 3 weeks, DayCalc Pro every 6 weeks. Both last shipped on October 23, 2026.
| Parameter | SciCalc82 | DayCalc Pro |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.6 (19 ratings) | 4.6 (180 ratings) — better |
| Positive reviews | 86.4% of reviews — better | 85.6% of reviews |
| Number of ratings | 19 | 180 — better |
| Update frequency | Every 3 weeks — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 8 MB | 98 MB |
| Age rating | 4+ | 4+ |
| Developer | Paul SALANITRI | 良峰 侯 |
Customer experience
SciCalc82
DayCalc Pro
Bugs and requests
SciCalc82
Not enough reviews yet to summarise bugs or 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
In-app purchases
SciCalc82
No 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
