Comparison

DayCalc Pro vs Whisker Buddy

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

Whisker Buddy

Read full description

Never wonder "Did I feed the cat?" or "When was the litter box scooped?" again. Whisker Buddy is your all-in-one cat care companion - thoughtfully designed to help you stay organized, build healthy daily routines, and give your feline friends the five-star care they deserve. Whether you are raising an energetic new kitten or managing a busy multi-cat household, Whisker Buddy brings feeding schedules, water refreshes, litter maintenance, play sessions, photo memories, and vet dates together into one calm, ad-free app. MEALTIME, PERFECTLY TIMED Keep your cat's feeding routine consistent every single day. - Track dry food and wet food routines separately - Set custom meal alerts so you never miss breakfast or dinner - View an intuitive, cat-themed feeding timeline at a glance - Keep multiple feeding schedules coordinated with ease HYDRATION MADE SIMPLE Fresh water is vital for your cat's kidney and urinary tract health. - Set customizable reminders to wash and refill water bowls - Stay on top of fountain cleanings and filter changes - Foster healthy daily hydration habits with zero guesswork CLEAN & FRESH LITTER BOX CARE A clean box means a happier cat and an odor-free home. - Set daily scoop reminders and recurring deep-clean alerts - Customize frequencies to match your litter box setup - Prevent litter box avoidance by staying consistently on schedule PLAYTIME & DAILY ENRICHMENT Channel those late-night zoomies into healthy bonding moments. - Schedule dedicated interactive play and exercise sessions - Support your cat's mental stimulation and physical well-being - Keep indoor cats happy, engaged, and stress-free COMPLETE FELINE PROFILES Keep every essential detail about your cats right at your fingertips. - Track name, gender, birth date, adoption date, weight, and favorite treats - Automatic age calculator for quick reference - Keep notes on food sensitivities, microchip IDs, and personality quirks - Seamlessly manage single cats or multiple fur babies ORGANIZED PHOTO ALBUMS Cherish every milestone and adorable pose without the camera-roll clutter. - Dedicated photo albums for each individual cat - Quickly find your favorite pictures without scrolling through thousands of photos - Perfect for multi-cat families EVENT CALENDAR & WISHLIST Stay ahead of your cat's health milestones and favorite things. - Track vet appointments, vaccine schedules, medications, and checkups - Never miss a birthday or "gotcha day" celebration - Save wishlists for toys, treats, and essential restock reminders CRAFTED FOR CAT LOVERS - Warm, cozy, and intuitive cat-inspired design - Satisfying haptic feedback and gentle sound effects - Fast, fluid, and built for effortless daily check-ins 100% PRIVATE & SUBSCRIPTION-FREE - No subscriptions: Unlock every feature from day one - No ads: Zero interruptions, banners, or trackers - Privacy first: All your cat's photos and care data stay securely on your device PERFECT FOR: - New cat parents building a reliable daily care routine - Multi-cat households balancing different diets and schedules - Busy pet parents who want effortless peace of mind - Anyone looking for a calm, private, and beautifully crafted pet journal Give your cat the care, routine, and love they deserve. Download Whisker Buddy today and bring effortless peace of mind to your daily cat care!

Screenshots

DayCalc Pro4 screens
Whisker Buddy4 screens

Verdict

The call

The clearest difference is in-app purchases: Whisker Buddy at none against DayCalc Pro's 9. DayCalc Pro's advantage is price ($0.99 vs $6.99) and update cadence (every 6 weeks vs every 6 months). On ads 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

CostPrice · In-app purchases · Ads · Monetization

DayCalc Pro costs $0.99 and Whisker Buddy $6.99 up front. DayCalc Pro sells 9 one-off in-app purchases. Whisker Buddy asks for nothing beyond the download.

UpkeepUpdate frequency

DayCalc Pro ships an update every 6 weeks, Whisker Buddy every 6 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

Scorecard4 real differences · 6 level
DayCalc Pro versus Whisker Buddy: the parameters behind the verdict, then further details
ParameterDayCalc ProWhisker Buddy
Price$0.99 — better$6.99
Rating4.6 (180 ratings) — better—
Positive reviews85.6% of reviews—
Number of ratings180 — better—
Update frequencyEvery 6 weeks — betterEvery 6 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad
Requires iOS15.0 — better16.4
Further details — not scored
Size98 MB87 MB
Age rating4+4+
Developer良峰 侯SimTeCon GmbH

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
Show 5 more
  • 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

Whisker Buddy

Not enough reviews yet to summarise bugs or requests.

In-app purchases

9 purchases

DayCalc Pro

One-time9
  • Constants Pack$0.99
  • Festivals Theme Pack 1$0.99
  • Season Theme Pack 1$0.99
Show 6 more
  • 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
None

Whisker Buddy

No in-app purchases

Questions

Is DayCalc Pro free?
DayCalc Pro costs $0.99, and also offers in-app purchases.
Is Whisker Buddy free?
Whisker Buddy costs $6.99, with no in-app purchases.
Do DayCalc Pro or Whisker Buddy have ads?
Neither DayCalc Pro nor Whisker Buddy shows ads.
Which is updated more often, DayCalc Pro or Whisker Buddy?
DayCalc Pro ships an update every 6 weeks, and Whisker Buddy every 6 months. Most recently, DayCalc Pro was updated on October 29, 2026 and Whisker Buddy on October 27, 2026.

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