# DayCalc Pro - Note Calculator — Calculator & Unit Converter > Calculator and unit converter with notes, scientific functions, and custom units. (iPhone/iPad app by 良峰 侯.) - Source: https://appshunter.io/ios/app/daycalc-pro-note-calculator/id654444242 (this page in markdown: same URL + `.md`) - Developer: [良峰 侯](https://appshunter.io/developer/654444245) - Category: Utilities, Productivity - Price: $0.99 with in-app purchases - Rating: 4.60/5 from 177 App Store ratings · 173 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 99 MB - Languages: American English, Danish, Dutch, French (France), German (Germany), Hungarian, Italian, Japanese, Korean, Polish and 5 more - Released: 2013-06-20 - Data updated: 2026-08-20 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/daycalc-pro-note-calculator/id654444242/reviews.md ## What is DayCalc Pro? 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 ## Key features - 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 ## Pricing and in-app purchases Base price: $0.99. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Complete Pack | $4.99 | one-time | | Constants Pack | $0.99 | one-time | | Custom Unit Pack | $1.99 | one-time | | Festivals Theme Pack 1 | $0.99 | one-time | | Season Theme Pack 1 | $0.99 | one-time | | Bird Theme Pack 1 | $0.99 | one-time | | Insects Theme Pack 1 | $0.99 | one-time | | Season Theme Pack 2 | $0.99 | one-time | | Festivals Theme Pack 2 | $0.99 | one-time | ## What do users think of DayCalc Pro? Overall sentiment: positive **Pros** - 👍 Easy to use and intuitive interface - 🎨 Customizable themes and colors - 📊 Comprehensive feature set (scientific, fractions, conversions) - 💰 Great value for price (free or $1) - 📝 Useful history/tape feature for tracking calculations - 🔄 Currency conversion functionality - ⚖️ Unit conversion tools - 🚀 No ads in app - 📱 Works well on both iPhone and iPad - ✏️ Ability to edit and check entries in history **Cons** - 🐛 Update installation issues and stuck downloads - 🐛 Display cutoff in landscape mode on smaller phones - 🐛 Fraction display cuts off large numbers - 🐛 Currency converter fails after favoriting - 🐛 Copy function only copies first number - 🐛 Exponent calculation errors - 🐛 Unit conversion inaccuracies (e.g., Fahrenheit to Celsius) - 🐛 App crashes when using unit conversion feature - ⚠️ Fraction operations insert operators within fraction instead of continuing calculation - ⚠️ Asks for reviews despite settings disabled **Commonly reported bugs** - 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 - 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 **Most requested features** - 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 ## Recent user reviews (10 of 173) All indexed reviews: https://appshunter.io/ios/app/daycalc-pro-note-calculator/id654444242/reviews.md ### 5/5 — Excellent ✅ *2026-05-09* Been using this calculator for more years than I can remember it’s never failed. It always works. I’ve deleted all the other calculators on all of my Apple devices and only use this one great calculator. **Developer response:** Hi, there is a separate macOS version of DayCalc, thanks. ### 5/5 — 俺にとっては最高の計算機アプリ *2026-03-10* もうずっとこれ使ってる これ以上に良いものはいまだに無い ### 5/5 — 好用 *2025-12-15, version 13.0* 好用，坚持不下架就好 ### 1/5 — Latest update stuck *2025-11-01, version 12.9* The latest update will not download. It’s just stuck showing as an update. Starts to update then stops and goes back to showing update. ### 1/5 — Lässt sich nicht installieren *2025-10-31* Seid dem letzten Update lässt sich die App nicht mehr aktualisieren bzw neu installieren 🥶 **Developer response:** Hello, it has now been successfully updated/installed. Please try again. Thank you. ### 1/5 — Lässt sich nicht mehr installieren *2025-10-31* Ich wollte den Taschenrechner aktualisieren, was nicht funktioniert hat. Immer wieder habe ich auf Aktualisieren geklickt. Download startet und am Ende wird es wieder als Update angezeigt. Das kann man endlos fortführen. Dann habe ich die App deinstalliert und wollte sie neu installieren. Das wird aber abgebrochen und ich kann die App gar nicht mehr installieren. Was ist da los? Bitte schnell fixen. **Developer response:** Hello, it has now been successfully updated/installed. Please try again. Thank you. ### 3/5 — アップデート *2025-10-31* アップデートができない、、対応お願いします。 **Developer response:** Hello, it has now been successfully updated/installed. Please try again. Thank you. ### 3/5 — Can't update! *2025-10-30, version 12.9* IPhone 12 mini's iOS v18.7.1. ### 5/5 — This is a great calculator app. *2025-04-22, version 11.12* I have been using it for many years. Never any issues with it. To the developers. Thanks for continuing to update. ### 5/5 — Good *2025-03-31, version 11.12* Really good calculator ## Frequently asked questions about DayCalc Pro ### What does DayCalc Pro do? DayCalc Pro is a versatile app that functions as both a calculator and a unit converter. It offers standard and scientific calculation modes, allows users to add notes to their calculation history, and provides extensive unit conversion capabilities across numerous categories. ### What are the key features of the calculator? The calculator includes live voice calculation, the ability to add and share notes with calculation history, basic and scientific modes with over 30 scientific operations, portrait and landscape support, split screen for iPad, and Dark Mode. It also supports Spotlight search. ### How does the unit converter work? The unit converter boasts over 600 units in 20 categories, including support for over 150 currencies with automatic exchange rate updates. Users can also add their own custom units and create favorite lists for frequently used conversions. ### Is DayCalc Pro free to use? The application is free to download and use, offering core calculator and unit converter functionalities. It also provides in-app purchases for additional features or themes, allowing users to enhance their experience. ### What devices is DayCalc Pro compatible with? DayCalc Pro is designed for Apple devices, including iPhone, iPad, and Apple Watch. It supports iOS 9 and later for iPhone and iPad, and watchOS 4 and later for Apple Watch, ensuring broad compatibility with modern Apple hardware. ## Version history (last 5 releases) ### 13.7 — 2026-08-17 + Refinement of functions ### 13.3 — 2026-05-08 + Refinement of functions ### 13.2 — 2026-03-12 + Bug fixes and performance improvements. ### 13.1 — 2025-12-18 + Refinement of functions ### 13.0 — 2025-12-15 + Bug fixes and stability improvements ## Apps similar to DayCalc Pro | App | Rating | Price | Category | | --- | --- | --- | --- | | [Calculator mini - Combo](https://appshunter.io/ios/app/calculator-mini-combo/id1672581992) | 4.2 (5) | Free | Utilities | | [VaultVoice Recorder](https://appshunter.io/ios/app/vaultvoice-recorder/id6752819741) | 3.0 (2) | Free | Utilities | | [Router Setup Page Pro](https://appshunter.io/ios/app/router-setup-page-pro/id6474254354) | 3.0 (2) | Free | Utilities | | [Ad Block Multi](https://appshunter.io/ios/app/ad-block-multi/id1037619477) | 4.5 (840) | $0.99 | Utilities | | [Emerald Chronometer](https://appshunter.io/ios/app/emerald-chronometer/id284953670) | 4.9 (105) | Free | Utilities | | [dB Meter-Decibel Sound Level](https://appshunter.io/ios/app/db-meter-decibel-sound-level/id1629575835) | — | Free | Utilities | ## More apps by 良峰 侯 - [Calculator Easy HD](https://appshunter.io/ios/app/calculator-easy-hd/id448246366) - [Unit Converter Pro HD.](https://appshunter.io/ios/app/unit-converter-pro-hd/id458584668) - [Unit Converter HD.](https://appshunter.io/ios/app/unit-converter-hd/id481973377) - [Currency Exchange](https://appshunter.io/ios/app/currency-exchange/id494172851) - [Level HD.](https://appshunter.io/ios/app/level-hd/id510249014) - [Toolkit](https://appshunter.io/ios/app/toolkit/id577678277) All apps by 良峰 侯: https://appshunter.io/developer/654444245 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-20.*