Comparison

Spark 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

Spark

This app simplifies shift work for professionals like first responders and healthcare workers. It offers full customization, secure cloud syncing, and streamlined shift trading. Plan your life and stay organized with instant visual cues and reliable support.

Highlights
  • Full shift customization
  • Secure cloud sync
  • Streamlined shift trades
  • Instant visual cues
  • Comprehensive shift coverage
  • User-friendly interface
Features
Read full description

Spark: Your Ultimate Shift Calendar App For over 15 years, Spark has been the go-to app for simplifying shift work. Loaded with powerful, user-friendly features, Spark helps you balance work and personal life in one place—trusted daily by fire, police, EMS, healthcare professionals, and shift workers worldwide. With Spark’s unique "Cloud Connect" system, you can sync and share your schedule across all devices, keeping you and your loved ones in the loop anytime, anywhere. Why Spark? Here’s why your colleagues love it: Full Customization Spark is designed for you. Track and log anything you need—vacation, sick time, comp time, overtime, trades, and more. Can’t find something? Add it with ease! Spark’s sleek, intuitive design lets you personalize everything to suit your work style. Secure & Reliable Your data is safe with us. Spark’s "Cloud Connect" syncs your encrypted calendar across devices, linked to your email. Lose or upgrade your phone? Just log back in, and it’s like you never left. Comprehensive Shift Coverage From pre-loaded schedules to custom department setups, Spark supports thousands of shift calendars. Don’t see yours? Easily create it, and it’s saved for you and your team. Streamlined Shift Trades & Swaps Manage and track all your trades and swaps down to the individual. Spark’s “Trade Board” lets you request and confirm trades within the app, automatically updating your calendar and stats—no extra steps. Instant Visual Cues Color-code shifts, events, and stats for at-a-glance planning. With Spark, you’ll know exactly what’s on the agenda without extra clicks. Unmatched Customer Support Our app thrives on user feedback. We’re committed to fast, helpful support, with most emails resolved in under two hours. Spark evolves with your input, making it the app you can rely on for years to come. Try Spark free for 30 days, and experience the app that’s helping shift workers around the world stay organized. Visit www.LeakyNozzle.com to learn more!

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

Spark4 screens
Fire Shift Calendar4 screens

Verdict

The call

Spark and Fire Shift Calendar both sit at 4.8 stars, but that hides the real split: 75% of Spark's written reviews are positive against 0% of Fire Shift Calendar's. Spark also leads on ads (none vs shown) and ratings volume (7.5K vs 16). Fire Shift Calendar's advantage is update cadence (fortnightly vs every 5 weeks). On price, rating, in-app purchases and monetization model 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. Spark sells 2 one-off in-app purchases 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 — 4.8 for Spark against 4.8 for Fire Shift Calendar. That said, the two scores are not equally well evidenced: Spark has 7.5K ratings behind it against 16, so its average is the more settled of the two. Written reviews are what separate them: 75% of Spark's written reviews are positive against 0% of Fire Shift Calendar's.

UpkeepUpdate frequency

Spark ships an update every 5 weeks, Fire Shift Calendar fortnightly. The most recent releases landed on September 22, 2026 and June 3, 2026 respectively.

Scorecard5 real differences · 5 level
Spark versus Fire Shift Calendar: the parameters behind the verdict, then further details
ParameterSparkFire Shift Calendar
PriceFreeFree
Rating4.8 (7.5K ratings)4.8 (16 ratings) — better
Positive reviews74.5% of reviews — better0.0% of reviews
Number of ratings7.5K — better16
Update frequencyEvery 5 weeksFortnightly — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better26.0
Further details — not scored
Size14 MB219 MB
Age rating4+4+
DeveloperE.L.K. Equities LLCAyodeji Shoola

Customer experience

Spark

All ratings7,300 ratings
Positive95.3%
Neutral2.9%
Negative1.8%
Written reviews157 reviews
Positive74.5%
Neutral8.9%
Negative16.6%

Fire Shift Calendar

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

Bugs and requests

Spark

Reported bugs

3 issues
  • Login and authentication problems
  • Data loss and sync issues after updates
  • Unreliable performance on some devices

Requested features

4 requests
  • Ability to sync with more calendar services
  • More customization options
  • Improved user interface and design
  • Ability to view past schedules and events

Fire Shift Calendar

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Spark

One-time2
  • Annual Subscription Renewal$0.99
  • Initial Annual Subscription$5.99
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 Spark free?
Spark 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, Spark or Fire Shift Calendar?
Fire Shift Calendar is rated higher. Spark averages 4.8 out of 5 from 7.5K ratings, while Fire Shift Calendar averages 4.8 from 16 ratings.
Do Spark or Fire Shift Calendar have ads?
Fire Shift Calendar shows ads; Spark does not.
Which is updated more often, Spark or Fire Shift Calendar?
Spark ships an update every 5 weeks, and Fire Shift Calendar fortnightly. Most recently, Spark was updated on September 22, 2026 and Fire Shift Calendar on June 3, 2026.

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