# Shift Master Shift Calendar vs First Due Mobile

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 chart position (#137 vs unranked). On ads, in-app purchases, monetization model and device support there is nothing between them.

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.

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.

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.

## The numbers

| Metric | Shift Master Shift Calendar | First Due Mobile |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [2.2 (25 ratings)](https://appshunter.io/ios/app/shift-master-shift-calendar/id385155631/reviews) | **[2.9 (813 ratings)](https://appshunter.io/ios/app/first-due-mobile/id1300758445/reviews)** |
| Number of ratings | 25 | **813** |
| Positive reviews | **46.9% of reviews** | 17.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | Free | Free |
| Best chart rank | **#137** | — |
| Size | 2 MB | 223 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gil Estes](https://appshunter.io/developer/349882768) | [Locality Media, Inc.](https://appshunter.io/developer/1355085433) |

## What reviewers say

### Shift Master Shift Calendar

[App page](https://appshunter.io/ios/app/shift-master-shift-calendar/id385155631)

**Currently charting:** #137 Top Paid · Productivity (US App Store)

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:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

- 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

**Requested features**

- 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


### First Due Mobile

[App page](https://appshunter.io/ios/app/first-due-mobile/id1300758445)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Accurate incident information
- 📊 Valuable pre-planning and response data
- 🗺️ Helpful mapping and navigation features
- 💡 Comprehensive all-in-one solution

**What reviewers complain about**

- 🐛 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

**Reported bugs**

- 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**

- Dark mode option
- Improved scheduling and shift management
- Apple Watch integration for alerts
- Offline functionality and caching
- Streamlined user interface and navigation


## Frequently asked 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.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*