Comparison

Spark vs Trades 3631

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

Trades 3631

This platform simplifies shift exchanges for firefighters. Post shifts, find coverage, negotiate terms, and manage trades securely. Manual account verification ensures authorized use.

Highlights
  • Post shifts
  • Find available coverage
  • Negotiate payback dates
  • Real-time notifications
  • Manage confirmed trades
  • Secure platform
Features
Read full description

Trades is a firefighter shift trading platform designed to simplify shift exchanges. Users can post shifts, find available coverage, negotiate payback dates, receive real-time notifications, and manage confirmed trades in one secure location. Accounts are manually verified before access is granted to help ensure only authorized personnel use the platform. Optional profile photos can be added using the device camera or photo library.

Screenshots

Spark4 screens
Trades 36314 screens

Verdict

The call

The clearest difference is in-app purchases: Trades 3631 at none against Spark's 2. Trades 3631 also leads on review sentiment (100% vs 75%) and rating (5.0 vs 4.8). Spark's advantage is ratings volume (7.5K vs 2). On price, ads, device support and iOS requirement 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. Trades 3631 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Trades 3631 holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Spark has 7.5K ratings behind it against 2, 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 100% of Trades 3631's.

UpkeepUpdate frequency

Spark ships an update every 5 weeks, Trades 3631 every 2 weeks. The most recent releases landed on October 29, 2026 and September 28, 2026 respectively.

Scorecard6 real differences · 4 level
Spark versus Trades 3631: the parameters behind the verdict, then further details
ParameterSparkTrades 3631
PriceFreeFree
Rating4.8 (7.5K ratings)5.0 (2 ratings) — better
Positive reviews74.8% of reviews100.0% of reviews — better
Number of ratings7.5K — better2
Update frequencyEvery 5 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size10 MB12 MB
Age rating4+4+
DeveloperE.L.K. Equities LLCAndrew Howell

Customer experience

Spark

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

Trades 3631

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 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

Trades 3631

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
None

Trades 3631

No in-app purchases

Questions

Is Spark free?
Spark is free to download, with in-app purchases available.
Is Trades 3631 free?
Trades 3631 is free to download, with no in-app purchases.
Which has better reviews, Spark or Trades 3631?
Trades 3631 is rated higher. Spark averages 4.8 out of 5 from 7.5K ratings, while Trades 3631 averages 5.0 from 2 ratings.
Do Spark or Trades 3631 have ads?
Neither Spark nor Trades 3631 shows ads.
Which is updated more often, Spark or Trades 3631?
Spark ships an update every 5 weeks, and Trades 3631 every 2 weeks. Most recently, Spark was updated on October 29, 2026 and Trades 3631 on September 28, 2026.

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