Comparison

Calendars vs Fire Shift Calendar

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

Head to head
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

About

Fire Shift Calendar

This app simplifies complex work schedules for shift workers. It offers custom shift patterns, automatic time tracking for benefits and overtime, and cross-device synchronization. Designed for professionals in emergency services, healthcare, and other industries with non-traditional hours.

Highlights
  • Custom shift pattern creation
  • Repeating rotation application
  • Color-coded shifts
  • Vacation, sick, and overtime tracking
  • Automatic accrual calculations
  • Cross-device synchronization
  • Calendar integration
Read full description

The smarter calendar built for shift workers Keeping track of complex shifts, overtime, and time off shouldn’t feel like a second job. Fire Shift Calendar is designed for firefighters, nurses, EMTs, police officers, and anyone working non-traditional hours. With powerful scheduling tools, benefit tracking, and instant sync across devices, your work life finally fits into one clean, easy calendar. Shifts Made Simple • Create custom patterns: 24-on/48-off, 12-hour rotations, split shifts, Kelly days, and more • Apply repeating rotations in seconds • Color-code shifts for instant clarity • Support for full, partial, or multi-day shifts • Create templates to quickly add non-repeating shifts Track Your Time, Automatically • Vacation, sick, comp, and overtime tracking • Automatic accrual calculations (daily, monthly, yearly) • Log trades/swaps, training hours, and exposures • Visual summaries of earned vs. used time Stay Ahead, Stay Connected • Sync shifts and records instantly across devices • Calendar integration with Apple Calendar • Multiple style widgets to see your upcoming shifts and events at a glance Built for You • Clean, modern interface with dark mode • Multiple views • Extremely customizable styles and colors—make the calendar look and feel exactly how you want Perfect for Every Shift Worker • Firefighters, EMTs, paramedics, police • Nurses, doctors, technicians, hospital staff • Security, transportation, retail, manufacturing, and more Why Fire Shift Calendar? Other calendar apps weren’t built with shift workers in mind. Fire Shift Calendar was. From the most complex rotations to automatic benefit accruals, it gives you the clarity, accuracy, and control you need—without the headache. Take control of your schedule. Download Fire Shift Calendar today.

Screenshots

Calendars4 screens
Fire Shift Calendar4 screens

Verdict

The call

Calendars and Fire Shift Calendar both sit at 4.7 stars, but that hides the real split: 55% of Calendars's written reviews are positive against 0% of Fire Shift Calendar's. Calendars also leads on ads (none vs shown) and ratings volume (122K vs 16). On price, rating, update cadence and in-app purchases 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 17 in-app purchases, starting at $3.99 per month and Fire Shift Calendar sells 8 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Calendars against 4.8 for Fire Shift Calendar. That said, the two scores are not equally well evidenced: Calendars has 122K ratings behind it against 16, so its average is the more settled of the two. Written reviews are what separate them: 55% of Calendars's written reviews are positive against 0% of Fire Shift Calendar's.

UpkeepUpdate frequency

Calendars ships an update every 11 days, Fire Shift Calendar fortnightly. The most recent releases landed on September 24, 2026 and June 3, 2026 respectively.

Scorecard6 real differences · 5 level
Calendars versus Fire Shift Calendar: the parameters behind the verdict, then further details
ParameterCalendarsFire Shift Calendar
PriceFreeFree
Rating4.7 (122K ratings)4.8 (16 ratings) — better
Positive reviews55.4% of reviews — better0.0% of reviews
Number of ratings122K — better16
Update frequencyEvery 11 days — betterFortnightly
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#104 — better—
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPad
Requires iOS18.2 — better26.0
Further details — not scored
Size407 MB219 MB
Age rating4+4+
DeveloperReaddle Technologies LimitedAyodeji Shoola

Customer experience

Calendars

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

Fire Shift Calendar

All ratings16 ratings
Positive93.8%
Neutral0.0%
Negative6.3%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and 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

Fire Shift Calendar

Not enough reviews yet to summarise bugs or requests.

In-app purchases

17 purchases

Calendars

Subscriptions8
  • 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 5 more
  • 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
8 purchases

Fire Shift Calendar

Subscriptions8
  • Monthly7 Days trial$1.991 Month
  • All Access7 Days trial$2.991 Month
  • Monthly7 Days trial$3.991 Month
Show 5 more
  • All Access$3.991 Month
  • Yearly14 Days trial$19.991 Year
  • All Access14 Days trial$29.991 Year
  • Yearly14 Days trial$39.991 Year
  • All Access$39.991 Year

Questions

Is Calendars free?
Calendars is free to download, with in-app purchases available.
Is Fire Shift Calendar free?
Fire Shift Calendar is free to download, with in-app purchases available.
Which has better reviews, Calendars or Fire Shift Calendar?
Fire Shift Calendar is rated higher. Calendars averages 4.7 out of 5 from 122K ratings, while Fire Shift Calendar averages 4.8 from 16 ratings.
Do Calendars or Fire Shift Calendar have ads?
Fire Shift Calendar shows ads; Calendars does not.
Which is updated more often, Calendars or Fire Shift Calendar?
Calendars ships an update every 11 days, and Fire Shift Calendar fortnightly. Most recently, Calendars was updated on September 24, 2026 and Fire Shift Calendar on June 3, 2026.

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