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DayCalc Pro - Note Calculator

DayCalc Pro - Note Calculator

Calculator & Unit Converter

180 ratings
174 reviews
🔧 Utilities
📊 Productivity
$0.99
In-App Purchases

Details

Released
June 20, 2013
Updated
September 28, 2026

Features

Developer

良峰 侯
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iphone
ipad
watch
🧾$0.99 - $4.99
In-App Purchase↘︎
📌Ready
Reviews summary↘︎
⭐174
Reviews↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦~ in 1 month
Updates frequency↘︎
🖼️Get Icon
Icons↘︎

About

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
Show original description

What users say about DayCalc Pro

Reviews of DayCalc Pro are mostly positive: the Utilities app is rated 4.6/5 from 180 App Store ratings. What users like most: easy to use and intuitive interface, customizable themes and colors. Top complaints: update installation issues and stuck downloads, display cutoff in landscape mode on smaller phones. Summarized from real user reviews.

Positive things

  • 👍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

Negative things

  • 🐛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
See all reviews

What's New in DayCalc Pro

13.9

September 28, 2026

+ Bug fixes and performance improvements.

9

Subscriptions & In-App Purchases

$4.99

Complete Pack

Buy all the extra features for DayCalc in one step.

User reviews

Most RecentHighest RatedLowest Rated

Excellent ✅

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.
Jjpitnc

Response from developer

Hi, there is a separate macOS version of DayCalc, thanks.

俺にとっては最高の計算機アプリ

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
Yyuuu21

好用

好用，坚持不下架就好
折折腾999

Latest update stuck

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.
PPapaHubbs

Lässt sich nicht installieren

Seid dem letzten Update lässt sich die App nicht mehr aktualisieren bzw neu installieren 🥶
F2Frodo 2015

Response from developer

Hello, it has now been successfully updated/installed. Please try again. Thank you.

See 169 more reviews

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User experience

🐞

Reported Bugs

10 issues

Latest update stuck on download/installation loop

Bug

Display rendering issues in landscape mode on iPhone 12/13 mini

Bug

Fraction results display truncated with large numbers

Bug

Fraction operator placement incorrect during multi-step calculations

Bug

Currency conversion broken after favoriting currencies

Bug

Copy expression only copies first number

Bug

Exponent calculation: .35 / 1 EE 6 returns 350,000 instead of correct value

Bug

Fahrenheit to Celsius conversion inaccurate (8°F returns 1.3°C)

Bug

App becomes unusable after using unit conversion feature

Bug

iOS 6 compatibility: black display and crashes

Bug
✨

Requested Features

5 requests

Cursor movement for easier digit and symbol editing

Feature

Back button to delete individual numbers instead of clearing all

Feature

History display directly above input without clicking

Feature

Back button in converter functions for easier navigation

Feature

Improved animated transitions for better aesthetics

Feature

FAQ

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.