Comparison

Shift Master Shift Calendar vs First Due Mobile

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

Shift Master Shift Calendar

$1.99

📊 Productivity

★ 2.225 ratingsView app →

First Due Mobile

For a safer & faster response

Free

📊 Productivity

★ 2.9813 ratingsView app →

About

Shift Master Shift Calendar

A highly customizable shift calendar designed for Firefighter, EMS, and Paramedic professionals. It supports up to four platoons or teams with flexible shift patterns up to 35 days long.

Highlights

Fully configurable shift calendar
Supports up to 4 platoons/teams
Single or first/second shift patterns
Shift rotation up to 35 days
Designed for Firefighter, EMS, Paramedic

Features

Read full description

Fully configurable Shift Calendar app for Firefighter, EMS and Paramedic Professionals. This app is now the flag ship app in the series and provides for full customization for up to 4 platoons/teams with single shift or first/second shift on a shift pattern rotation of up to 35 days in length.

About

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.

Highlights

Incident tracking and notification
Emergency response routing
Building data integration
Pre-incident planning
Team chat communication
Live unit tracking

Features

Read full description

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

Shift Master Shift Calendar4 screens

First Due Mobile4 screens

Verdict

The call

The clearest difference is price: First Due Mobile at Free against Shift Master Shift Calendar's $1.99. First Due Mobile also leads on rating (2.9 vs 2.2) and ratings volume (813 vs 25). Shift Master Shift Calendar's advantage is review sentiment (47% vs 17%) and iOS requirement (9.0 vs 17.0). On ads, in-app purchases, monetization model 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

First Due Mobile is free to download; Shift Master Shift Calendar costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

First Due Mobile holds the better App Store score, 2.9 against 2.2. That said, the two scores are not equally well evidenced: First Due Mobile has 813 ratings behind it against 25, so its average is the more settled of the two. Written reviews complicate that: 47% of Shift Master Shift Calendar's written reviews are positive against 17% of First Due Mobile's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Shift Master Shift Calendar ships an update every 5 weeks, First Due Mobile fortnightly. The most recent releases landed on September 26, 2026 and September 27, 2026 respectively.

Scorecard6 real differences · 4 level

Shift Master Shift Calendar versus First Due Mobile: the parameters behind the verdict, then further details
Parameter	Shift Master Shift Calendar	First Due Mobile
Price	$1.99	Free — better
Rating	2.2 (25 ratings)	2.9 (813 ratings) — better
Positive reviews	46.9% of reviews — better	17.0% of reviews
Number of ratings	25	813 — better
Update frequency	Every 5 weeks	Fortnightly — better
Ads	No	No
In-app purchases	No	No
Monetization	Free	Free
Devices	iPhone, iPod	iPhone, iPad
Requires iOS	9.0 — better	17.0
Further details — not scored
Size	2 MB	223 MB
Age rating	4+	4+
Developer	Gil Estes	Locality Media, Inc.

Customer experience

Shift Master Shift Calendar

All ratings25 ratings

Positive32.0%

Neutral0.0%

Negative68.0%

Written reviews98 reviews

Positive46.9%

Neutral4.1%

Negative49.0%

First Due Mobile

All ratings813 ratings

Positive40.6%

Neutral11.4%

Negative48.0%

Written reviews265 reviews

Positive17.0%

Neutral16.6%

Negative66.4%

User reviews

Shift Master Shift Calendar

From 25 App Store ratings

What we love

👍 Simple and easy to use
👍 Works for various shift rotations
👍 Good for long-term planning
👍 Customizable colors
👍 Prompt customer support (historically)

Room to improve

🐛 App won't open/load
🐛 Crashes frequently
🐛 Lost data after updates
🐛 Confusing setup/not user-friendly
🐛 Incompatible with iOS updates

First Due Mobile

From 813 App Store ratings

What 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

Shift Master Shift Calendar

Reported bugs

15 issues

App does not open
App crashes frequently
App disappeared after iOS update
Calendar days are purple/won't change color
Erases notes and resets shift days after updates

Show 10 more

Customized dates deleted after update
Buttons along the bottom don't function without reboot
Shift colors change with the month
App shuts down occasionally
App fails to open after iOS update
Shifts are off after January 1st
App crashes on opening
App doesn't work with iOS 6/10/11
Calendar places shifts incorrectly
Setup key closes app

Requested features

7 requests

Update for newest iOS versions
Sync with iPhone calendar
Add appointment scheduler with reminders
Display shift letters across the top
Enter half color/symbol for partial OT shifts

Show 2 more

Make UI less cluttered and more visually appealing
Ability to load on iPad

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

None

Shift Master Shift Calendar

No in-app purchases

None

First Due Mobile

No in-app purchases

Questions

Is Shift Master Shift Calendar free?

Shift Master Shift Calendar costs $1.99, with no in-app purchases.

Is First Due Mobile free?

First Due Mobile is free to download, with no in-app purchases.

Which has better reviews, Shift Master Shift Calendar or First Due Mobile?

First Due Mobile is rated higher. Shift Master Shift Calendar averages 2.2 out of 5 from 25 ratings, while First Due Mobile averages 2.9 from 813 ratings.

Do Shift Master Shift Calendar or First Due Mobile have ads?

Neither Shift Master Shift Calendar nor First Due Mobile shows ads.

Which is updated more often, Shift Master Shift Calendar or First Due Mobile?

Shift Master Shift Calendar ships an update every 5 weeks, and First Due Mobile fortnightly. Most recently, Shift Master Shift Calendar was updated on September 26, 2026 and First Due Mobile on September 27, 2026.