Comparison

Shift Worker vs Calendars

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

Head to head
About

Shift Worker

Easily enter and view your work schedule with custom shift types, icons, and colors. Quickly add entire months or years of shifts and share them with others. Save your schedule to your device's background for instant access.

Highlights
  • Custom shift types with icons and colors
  • Quick shift entry for months/years
  • Multiple calendar support
  • Share shifts with others
  • Save schedule to background
  • Personalized notes for dates
  • Timeline view
Features
Currently charting
Read full description

Shift Worker is designed for people who need a quick and easy way to enter and view their shifts. A traditional calendar is not always ideal for shift workers. Sometimes it's not easy to see your upcoming shift schedule very clearly, especially if your shifts don't fall into the traditional working week. Shift Worker solves this problem and turns the frustrating task of entry into a quick and easy experience. Shift Worker allows you to create your own types of shifts by combining visually-attractive icons with letters/numbers so that they can be easily identified at a glance. By including a range of icons (such as suns and stars for day and night shifts) in a variety of colors, any combination is possible for all types of shifts. Entering shifts can be done quickly by simply selecting a type of shift and tapping on each date it occurs. An entire month of shifts could be entered in seconds, an entire year in a few minutes! In addition, Shift Worker allows you create multiple calendars to see friends and family shifts! You can send your shifts to others so they can also see your shifts at a glance as an image or in their copy of Shift Worker. To make things even simpler, you can even save your shifts to your iPhone/iPod's background so that referring to your upcoming shift schedule is as simple as picking up your iPhone/iPod. Shift Worker also includes the ability to create colored personalized notes for each date. Notes can be used anytime additional information needs to be added to a date. FEATURES: - Create a virtually unlimited amount of shift types - Enter shifts on the calendar months in advance in seconds - Add your rotation and automatically fill the calendar in a few simple steps - Show friends and family shifts using multiple calendars - View the calendar in timeline format to see your shift flow at a glance - Create colored personalized notes for any date on the calendar - Include week of year or week 1/2 alternating pattern on calendar - Jump to any month by using the "Goto" button - Save a month's worth of shifts to your background - Share your shifts to others via email, messages and social media. - Import other Shift Worker shifts and view them all within the one app - No ads! Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Calendars

This app combines a calendar, task manager, daily planner, and habit tracker. It helps users plan their day, build habits, boost productivity, and stay organized with seamless syncing across all Apple devices. Features include event creation, to-do list management, natural language input, and integration with popular meeting platforms.

Highlights
  • Calendar, task, and habit management
  • Daily, weekly, and monthly views
  • Natural language event creation
  • To-do list organization
  • Cross-device syncing
  • Meeting platform integration
Features
Read full description

Calendars by Readdle is the all-in-one calendar, task manager, daily planner, and habit tracker — seamlessly working across all your Apple devices: Mac, iPhone, iPad, and Apple Watch. Plan your day, build better habits, boost productivity, and stay organized with powerful features and smooth sync between all your devices. What you can do with Calendars: • View and manage your calendar with daily, weekly, and monthly views • Create events, set reminders, and never miss important dates • Use the built-in agenda planner to focus on what matters most • Organize your to-do list and manage your tasks with ease • Quickly add events or to-do items using natural language • Build routines and track your habits to stay consistent • Take a guided productivity course to improve time management and focus • Sync across devices with Google Calendar, iCloud, and more • Customize your planner calendar with color coding and widgets • Join Zoom, Google Meet, or GoToMeeting directly from your calendar • Stay in control of your time, wherever you are Whether you're planning a busy workday, building new habits, or working on personal growth, Calendars brings everything together to help you own your time — across all your Apple devices. Privacy Policy: https://readdle.com/calendars/legal/privacy Terms of Service: https://readdle.com/calendars/legal/terms Have questions, comments, or issues? Don’t hesitate to reach out to us at http://readdle.com/contact

Screenshots

Shift Worker4 screens
Calendars4 screens

Verdict

The call

The clearest difference is price: Calendars at Free against Shift Worker's $1.99. Calendars also leads on rating (4.7 vs 3.7) and ratings volume (122K vs 102). Shift Worker's advantage is in-app purchases (none vs 20) and iOS requirement (15.6 vs 18.2). On update cadence, ads and chart position 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

Calendars is free to download; Shift Worker costs $1.99 up front. Calendars sells 18 in-app purchases, starting at $3.99 per month. Shift Worker asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Calendars holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: Calendars has 122K ratings behind it against 102, so its average is the more settled of the two. Written reviews point the same way: 47% of Shift Worker's written reviews are positive against 55% of Calendars's.

UpkeepUpdate frequency

Shift Worker ships an update weekly, Calendars every 11 days. The most recent releases landed on September 28, 2026 and September 30, 2026 respectively.

Scorecard8 real differences · 3 level
Shift Worker versus Calendars: the parameters behind the verdict, then further details
ParameterShift WorkerCalendars
Price$1.99Free — better
Rating3.7 (102 ratings)4.7 (122K ratings) — better
Positive reviews46.6% of reviews55.4% of reviews — better
Number of ratings102122K — better
Update frequencyWeekly — betterEvery 11 days
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank#83 — better#98
DevicesiPhone, iPodiPhone, iPad, Mac, Apple Watch — better
Requires iOS15.6 — better18.2
Further details — not scored
Size8 MB408 MB
Age rating4+4+
DeveloperProduction Shed Pty LtdReaddle Technologies Limited

Customer experience

Shift Worker

All ratings102 ratings
Positive65.7%
Neutral15.7%
Negative18.6%
Written reviews457 reviews
Positive46.6%
Neutral20.6%
Negative32.8%

Calendars

All ratings121,813 ratings
Positive93.8%
Neutral3.1%
Negative3.1%
Written reviews1,257 reviews
Positive55.4%
Neutral8.8%
Negative35.7%

User reviews

Shift Worker

From 102 App Store ratings

What we love

  • 🌟 Excellent for shift workers
  • 📅 Easy to organize schedules
  • 🎨 Customizable icons and colors
  • 🧭 Helpful for managing complex rotations
  • 🤝 Useful for couples/families to align schedules

Room to improve

  • 🐛 Crashes when adding notes
  • 📝 Limited note display
  • 🔄 Lack of sync between devices
  • 🗓️ Issues with iOS updates deleting data
  • 🔍 Difficulty finding support

Calendars

From 122K App Store ratings

What we love

  • 🌟 Excellent calendar app
  • 👍 Easy to use and organize
  • 🎨 Helpful color-coding
  • 📆 Seamless integration with other calendars
  • 🗓️ Detailed monthly/weekly views

Room to improve

  • 🐛 Occasional glitches and data loss
  • 💰 Concerns over subscription model
  • 🕰️ Cumbersome date/time selection process
  • 🔍 Limited location search functionality
  • 🔄 Sync issues between devices

Bugs and requests

Shift Worker

Reported bugs

4 issues
  • App crashes when trying to add notes
  • Notes disappearing after iOS updates
  • Calendar dates/days not displaying correctly
  • Inability to export/import schedules

Requested features

5 requests
  • Add ability to view full notes
  • Implement iCloud/calendar sync
  • Allow multiple shift entries per day
  • Add recurring note/reminder features
  • Develop Apple Watch app integration

Calendars

Reported bugs

3 issues
  • Disappearing events and appointments
  • Upgrade process causing data loss
  • Freezing and crashing on certain devices

Requested features

5 requests
  • Recurring events for free users
  • Customizable widgets and app icons
  • Ability to archive/restore past events
  • Improved Apple Watch integration
  • Shared calendars and family management

In-app purchases

None

Shift Worker

No in-app purchases

18 purchases

Calendars

Subscriptions9
  • Calendars PRO 1 Month$3.991 Month
  • Calendars by Readdle: Interesting Calendars1 Month trial$3.991 Year
  • Calendars PRO 1 Month7 Days trial$3.991 Month
Show 6 more
  • Calendars PRO 1 Year3 Months trial$19.991 Year
  • Calendars PRO 1 Year7 Days trial2 variants$19.991 Year
  • Calendars PRO 1 Year1 Year trial$19.991 Year
  • Calendars PRO 1 Year14 Days trial$19.991 Year
  • Calendars PRO 1 Year7 Days trial$21.991 Year
  • Calendars PRO 1 Year7 Days trial$29.991 Year
One-time9
  • Calendars PRO LifetimeFree
  • Invites & Attendees Upgrade$1.99
  • Smart Input Upgrade$1.99
Show 6 more
  • Full Upgrade$4.99
  • Interesting Calendars$5.99
  • My schedule planner, Organizer$6.99
  • Full Pack$12.99
  • Reminders & Calendars$19.99
  • Recurring Events$31.99

Questions

Is Shift Worker free?
Shift Worker costs $1.99, with no in-app purchases.
Is Calendars free?
Calendars is free to download, with in-app purchases available.
Which has better reviews, Shift Worker or Calendars?
Calendars is rated higher. Shift Worker averages 3.7 out of 5 from 102 ratings, while Calendars averages 4.7 from 122K ratings.
Do Shift Worker or Calendars have ads?
Neither Shift Worker nor Calendars shows ads.
Which is updated more often, Shift Worker or Calendars?
Shift Worker ships an update weekly, and Calendars every 11 days. Most recently, Shift Worker was updated on September 28, 2026 and Calendars on September 30, 2026.
Which is more popular, Shift Worker or Calendars?
Shift Worker currently peaks at #83 in the App Store charts, and Calendars at #98. Chart position reflects recent download velocity rather than total install base.

Other comparisons