# First Due Mobile vs CalMapper

First Due Mobile and CalMapper are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

First Due Mobile ships an update fortnightly, CalMapper monthly. The most recent releases landed on September 27, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | First Due Mobile | CalMapper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.9 (813 ratings)](https://appshunter.io/ios/app/first-due-mobile/id1300758445/reviews)** | — |
| Number of ratings | **813** | — |
| Positive reviews | 17.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Free | — |
| Size | 223 MB | 115 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Locality Media, Inc.](https://appshunter.io/developer/1355085433) | [Technosylva Inc.](https://appshunter.io/developer/996363141) |

## What reviewers say

### 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


### CalMapper

[App page](https://appshunter.io/ios/app/calmapper/id6742887561)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is First Due Mobile free?

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

### Is CalMapper free?

CalMapper is free to download, with no in-app purchases.

### Do First Due Mobile or CalMapper have ads?

Neither First Due Mobile nor CalMapper shows ads.

### Which is updated more often, First Due Mobile or CalMapper?

First Due Mobile ships an update fortnightly, and CalMapper monthly. Most recently, First Due Mobile was updated on September 27, 2026 and CalMapper on September 18, 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.*