Comparison

Spark vs Days

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

Days

Features
Read full description

This simple app calculate the number of days to an event from Today to a specific date. Can't remember how many days you still have to plan for your Wedding or prepare a present? Using this app and the Today extension included, the number of days you need to remember are just a swipe away! Just record it into the app and let the extension worry about the rest!

Screenshots

Spark4 screens
Days3 screens

Verdict

The call

The clearest difference is in-app purchases: Days at none against Spark's 2. Days also leads on update cadence (fortnightly vs every 5 weeks) and iOS requirement (8.0 vs 15.6). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Spark sells 2 one-off in-app purchases. Days asks for nothing beyond the download.

UpkeepUpdate frequency

Spark ships an update every 5 weeks, Days fortnightly. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Spark versus Days: the parameters behind the verdict, then further details
ParameterSparkDays
PriceFreeFree
Rating4.8 (7.5K ratings) — better—
Positive reviews74.8% of reviews—
Number of ratings7.5K — better—
Update frequencyEvery 5 weeksFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.68.0 — better
Further details — not scored
Size10 MB11 MB
Age rating4+4+
DeveloperE.L.K. Equities LLCMervyn Ong

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

Days

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

Days

No in-app purchases

Questions

Is Spark free?
Spark is free to download, with in-app purchases available.
Is Days free?
Days is free to download, with no in-app purchases.
Do Spark or Days have ads?
Neither Spark nor Days shows ads.
Which is updated more often, Spark or Days?
Spark ships an update every 5 weeks, and Days fortnightly. Most recently, Spark was updated on October 29, 2026 and Days on October 24, 2026.

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