Comparison

Shift Scheduler 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 Scheduler

Manage your work schedule with this app. It offers flexible shift arrangement, holiday tracking, and customizable calendar views with icons and colors. Record clock-in/out times and set reminders for your shifts.

Highlights
  • Flexible shift arrangement
  • Holiday tracking (US, UK, Canada, etc.)
  • Customizable calendar with 40+ icons and unlimited colors
  • Clock-in/out time recording
  • Shift reminders
  • Enable/disable shifts for calendar view
Features
Read full description

Shift Scheduler is a useful shift management tool with holiday, free combo shift, alarm for work, and more... It use freedom algorithm to pick shift days, can arrange every shift with combo of the unlimited shifts. It will show your shift schedule in a calendar with Character or 40+ icons combine with unlimited colors, so it will be very easy to show when you arrange much of shift. It can disable shift you don’t need show in calendar recently, and don’t needs to delete it, only one click it can be re-show in your calendar again. It also support record the clock in time and work off time, and it can alert you when it coming with much of time option can be choose. Feature which supported: • Freedom pick shift days, can arrange every shift ! • (NEW!) Holiday, you can show US, UK, Canada, HongKong, Taiwan, China Holidays in your calendar. • ICON: You can now choose your favorite ICON of you shift, about 40+ icon can be choose ! • Character: show the first character on shift name in your calendar view. • Color: You can choose different color with the ICON, unlimited color can be choose! • Unlimited Shift Profile: You can enable or disable the shift in shift list menu, so you don't need to delete any shift configure! disable the shift will let shift not show on your calendar view! • Clock In time: you can choose every shift 's clock in time and off time ! • Reminder: You can choose let Shift Scheduler remind you before Clock in or work off ! • Setting & Review & Feedback: Setting Menu can now feedback to me and rating this app now!

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 Scheduler4 screens
Calendars4 screens

Verdict

The call

The clearest difference is in-app purchases: Shift Scheduler at none against Calendars's 20. Shift Scheduler also leads on iOS requirement (15.0 vs 18.2). Calendars's advantage is update cadence (every 11 days vs every 2 months) and ratings volume (122K vs 7). On price, rating, review sentiment 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Calendars sells 18 in-app purchases, starting at $3.99 per month. Shift Scheduler asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Shift Scheduler against 4.7 for Calendars. That said, the two scores are not equally well evidenced: Calendars has 122K ratings behind it against 7, so its average is the more settled of the two. Written reviews are what separate them: 60% of Shift Scheduler's written reviews are positive against 55% of Calendars's.

UpkeepUpdate frequency

Shift Scheduler ships an update every 2 months, Calendars every 11 days. The most recent releases landed on June 5, 2026 and September 25, 2026 respectively.

Scorecard7 real differences · 4 level
Shift Scheduler versus Calendars: the parameters behind the verdict, then further details
ParameterShift SchedulerCalendars
PriceFreeFree
Rating4.7 (7 ratings)4.7 (122K ratings)
Positive reviews60.0% of reviews — better55.4% of reviews
Number of ratings7122K — better
Update frequencyEvery 2 monthsEvery 11 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank—#103 — better
DevicesiPhone, iPodiPhone, iPad, Mac, Apple Watch — better
Requires iOS15.0 — better18.2
Further details — not scored
Size17 MB407 MB
Age rating4+4+
Developer洁靖 张Readdle Technologies Limited

Customer experience

Shift Scheduler

All ratings7 ratings
Positive85.7%
Neutral14.3%
Negative0.0%
Written reviews15 reviews
Positive60.0%
Neutral20.0%
Negative20.0%

Calendars

All ratings121,639 ratings
Positive93.8%
Neutral3.1%
Negative3.1%
Written reviews1,247 reviews
Positive55.4%
Neutral8.9%
Negative35.7%

Bugs and requests

Shift Scheduler

Not enough reviews yet to summarise bugs or requests.

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 Scheduler

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 Scheduler free?
Shift Scheduler is free to download, with no in-app purchases.
Is Calendars free?
Calendars is free to download, with in-app purchases available.
Which has better reviews, Shift Scheduler or Calendars?
Shift Scheduler and Calendars are both rated 4.7 out of 5 on the App Store, from 7 and 122K ratings respectively.
Do Shift Scheduler or Calendars have ads?
Neither Shift Scheduler nor Calendars shows ads.
Which is updated more often, Shift Scheduler or Calendars?
Shift Scheduler ships an update every 2 months, and Calendars every 11 days. Most recently, Shift Scheduler was updated on June 5, 2026 and Calendars on September 25, 2026.

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