Comparison

Spark vs Frontline

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

Frontline

This app helps first responders manage their complex work schedules with a user-friendly calendar. It supports various shift patterns, allows for logging events and incidents, and offers a private, device-only storage solution. Optional Pro features enhance functionality with advanced logging and widgets.

Highlights
  • Supports diverse shift patterns
  • Month and week view
  • Home-screen widgets
  • Shift trade logging
  • Event and reminder management
  • Incident and exposure log
  • PDF and calendar export
Features
Read full description

Frontline is the shift calendar built for first responders - Firefighters, EMS, Police and 911 Dispatch. Set up your rotation in about 30 seconds, then see your whole month at a glance. Frontline knows the schedules crews actually work - 24/48, 48/96, 24/72, 1/3/2/3, Kelly, Pitman, 4-on/4-off, DuPont and more - so you pick yours and you're done. No account. No setup headache. Not on a rotation? Straight days, a 9/80, a regular work week - Fire Marshals, inspectors, detectives, SROs, retirees, spouses and office staff all have a setup, or you can skip work days entirely and just use the calendar. BUILT FOR THE WAY YOU WORK - Large month calendar. Your on-duty days, events and reminders at a glance, in a dark design made for night shift. - Shift trades. Log who's covering, track who owes who, and text a clean trade card that makes it obvious to everyone involved. - Events and quick adds. Court, training, overtime, appointments, sick, vacation - color-coded, with reminders that fire before your shift. - Share your rotation. Send your schedule to a new hire or your spouse with a code to scan or a link to text - they get your work days on their phone in one tap. - Home-screen widgets. Your month or your week, always on. - Hours tracked. Log OT, sick, vacation and comp by the day, and see the totals. - Career tracking. Career shift count, rank history, milestones, and the day you clear probation. - Print and export. A clean PDF of your month, or send your shifts to your other calendars. - Dark and light. Night-shift ready either way. FRONTLINE PRO - Leave balances. Vacation, sick and comp counted down in shifts as you use them and up on every payday. Set your own accrual rate and cap, and get warned before you hit the ceiling and stop earning. - Vacation bids. Tap every day you picked, across the whole year, and stamp them all in one pass. - Calendar sync. Keep your shifts on your Google or Apple calendar so your family sees them without you texting a screenshot. - More calendar views. Week, day timeline and agenda. - Certifications. CPR, ACLS, HazMat and the rest, counting down in shifts, with reminders before anything lapses. - Incident and exposure log. A fast, private, date-stamped record of the calls that matter - cancer presumption, bloodborne exposure, a court date years out. Export it as a clean PDF. - Partial trades and hours owed. Trade part of a shift instead of the whole thing, and see exactly how many hours you owe each person. - Partner schedule. Your next day off together, and every day you both work, in a color you pick. - Month, week and day widgets, unlimited share cards, and PDF exports by week, day or year. NO ACCOUNT NEEDED Your schedule, events, trades and notes are stored on your phone, not on our servers. Your schedule is yours. Free includes the full rotation calendar, events and quick adds, shift trades, rotation sharing, hours tracking, career tracking, the week widget, and month PDF and calendar-file export. Frontline Pro unlocks the rest, as a one-time Lifetime purchase or a yearly subscription. Made by Code 3 Tek. Built by a Fire Captain who got tired of clunky schedules. Privacy Policy: https://frontlinecalendar.com/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Spark4 screens
Frontline4 screens

Verdict

The call

The clearest difference is update cadence: Frontline at every 4 days against Spark's every 5 weeks. Frontline also leads on review sentiment (100% vs 75%). Spark's advantage is ratings volume (7.5K vs 36). On price, rating, ads 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. Spark sells 2 one-off in-app purchases and Frontline sells 2 in-app purchases, starting at $9.99 per year. 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 Frontline. That said, the two scores are not equally well evidenced: Spark has 7.5K ratings behind it against 36, 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 100% of Frontline's.

UpkeepUpdate frequency

Spark ships an update every 5 weeks, Frontline every 4 days. Both last shipped on October 20, 2026.

Scorecard3 real differences · 7 level
Spark versus Frontline: the parameters behind the verdict, then further details
ParameterSparkFrontline
PriceFreeFree
Rating4.8 (7.5K ratings)4.8 (36 ratings)
Positive reviews74.8% of reviews100.0% of reviews — better
Number of ratings7.5K — better36
Update frequencyEvery 5 weeksEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better16.4
Further details — not scored
Size10 MB77 MB
Age rating4+4+
DeveloperE.L.K. Equities LLCCode3Tek

Customer experience

Spark

All ratings7,510 ratings
Positive95.2%
Neutral2.9%
Negative1.9%
Written reviews159 reviews
Positive74.8%
Neutral8.8%
Negative16.4%

Frontline

All ratings36 ratings
Positive94.4%
Neutral0.0%
Negative5.6%
Written reviews25 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

Frontline

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
2 purchases

Frontline

Subscriptions1
  • Frontline Pro Yearly$9.991 Year
One-time1
  • Frontline Pro (Lifetime)$14.99

Questions

Is Spark free?
Spark is free to download, with in-app purchases available.
Is Frontline free?
Frontline is free to download, with in-app purchases available.
Which has better reviews, Spark or Frontline?
Spark and Frontline are both rated 4.8 out of 5 on the App Store, from 7.5K and 36 ratings respectively.
Do Spark or Frontline have ads?
Neither Spark nor Frontline shows ads.
Which is updated more often, Spark or Frontline?
Spark ships an update every 5 weeks, and Frontline every 4 days. Most recently, Spark was updated on October 20, 2026 and Frontline on October 20, 2026.

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