Spark vs First Due Mobile
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Full shift customization
- Secure cloud sync
- Streamlined shift trades
- Instant visual cues
- Comprehensive shift coverage
- User-friendly interface
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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!
First Due Mobile
Receive real-time incident notifications and navigate directly to emergencies with optimized routing. Access critical building data, pre-plans, and team communication tools for enhanced situational awareness and faster response.
- Incident tracking and notification
- Emergency response routing
- Building data integration
- Pre-incident planning
- Team chat communication
- Live unit tracking
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First Due Mobile is finally here! Be notified, arrive safely and understand your scene like never before. First Due Mobile includes: -Incident tracking and notification -Emergency response specific routing -Integrated Assessor, Building Department and Fire Prevention data! -Quick size-up on every building -Detailed pre-plans on every building including residential! -Pre-Incident Planning & Mapping -Chat for easy communication with your team -Incident statusing and responding functionality -Live unit and team member tracking during incident
Screenshots
Verdict
The clearest difference is review sentiment: Spark at 75% against First Due Mobile's 18%. Spark also leads on rating (4.8 vs 2.8) and ratings volume (7.5K vs 835). First Due Mobile's advantage is in-app purchases (none vs 2) and update cadence (fortnightly vs every 5 weeks). On price, ads and device support 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
Both are free to download. Spark sells 2 one-off in-app purchases. First Due Mobile asks for nothing beyond the download.
Spark holds the better App Store score, 4.8 against 2.8. That said, the two scores are not equally well evidenced: Spark has 7.5K ratings behind it against 835, so its average is the more settled of the two. Written reviews point the same way: 75% of Spark's written reviews are positive against 18% of First Due Mobile's.
Spark ships an update every 5 weeks, First Due Mobile fortnightly. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.
| Parameter | Spark | First Due Mobile |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (7.5K ratings) — better | 2.8 (835 ratings) |
| Positive reviews | 74.8% of reviews — better | 17.7% of reviews |
| Number of ratings | 7.5K — better | 835 |
| Update frequency | Every 5 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 10 MB | 226 MB |
| Age rating | 4+ | 4+ |
| Developer | E.L.K. Equities LLC | Locality Media, Inc. |
Customer experience
Spark
First Due Mobile
User reviews
Spark
From 7.5K App Store ratingsWhat we love
- 🚀 Excellent calendar app
- 👍 Easy to use and set up
- 🔒 Secure and reliable
- 💡 Customizable and feature-rich
- 👍 Great for shift work and emergency services
Room to improve
- 🐛 Occasional crashes and bugs
- 💰 Subscription model and pricing issues
- 🔧 Needs more frequent updates
- 🔧 Compatibility issues with newer devices
- 🔧 Lack of certain features (e.g., widgets, dark mode)
First Due Mobile
From 835 App Store ratingsWhat we love
- 🚀 Accurate incident information
- 📊 Valuable pre-planning and response data
- 🗺️ Helpful mapping and navigation features
- 💡 Comprehensive all-in-one solution
Room to improve
- 🐛 Frequent crashes and stability issues
- 📱 Clunky and unintuitive mobile interface
- ⏱️ Slow incident notifications and app loading
- 🔇 Lack of customizable alert tones and settings
- 🤯 Overwhelming number of features, poor usability
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
First Due Mobile
Reported bugs
4 issues- Addresses not accurately displayed
- Inability to log out or switch between departments
- Inconsistent behavior across iOS and Android
- Unreliable push notifications and alerts
Requested features
5 requests- Dark mode option
- Improved scheduling and shift management
- Apple Watch integration for alerts
- Offline functionality and caching
- Streamlined user interface and navigation
In-app purchases
Spark
- Annual Subscription Renewal$0.99
- Initial Annual Subscription$5.99
First Due Mobile
No in-app purchases
Questions
Is Spark free?
Is First Due Mobile free?
Which has better reviews, Spark or First Due Mobile?
Do Spark or First Due Mobile have ads?
Which is updated more often, Spark or First Due Mobile?
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