# Who's Responding? vs MRF Tracking Viewer

The clearest difference is update cadence: Who's Responding? at fortnightly against MRF Tracking Viewer's every 6 weeks. MRF Tracking Viewer's advantage is iOS requirement (11.0 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.

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

Who's Responding? ships an update fortnightly, MRF Tracking Viewer every 6 weeks. The most recent releases landed on September 21, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Who's Responding? | MRF Tracking Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (7 ratings)](https://appshunter.io/ios/app/whos-responding/id951921253/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 31.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 6 weeks |
| Monetization | Subscription | — |
| Size | 133 MB | 1 MB |
| Requires iOS | 16.4 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fluent Information Management Systems, Inc.](https://appshunter.io/developer/951921252) | [MRF Geosystems Corporation](https://appshunter.io/developer/1022031549) |

## What reviewers say

### Who's Responding?

[App page](https://appshunter.io/ios/app/whos-responding/id951921253)

This app facilitates rapid alerting and coordination for specialized teams, groups, and individuals. It offers customizable notifications, real-time tracking, and access to digital resources for efficient incident response and operational management.

**Highlights:** Customized notifications, Real-time tracking, Navigation to incident locations, Live radio streaming, Hands-free alert speaking, Mapping tools, Digital resource access

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Great app for firefighters
- 🚀 Fast alerts, often before pagers
- 💡 Good communication and member coordination
- 💡 Customizability for specific needs
- 💡 New features and improvements noted

**What reviewers complain about**

- 🐛 Unreliable notifications/alerts
- 🐛 App crashes frequently
- 🐛 Black screen issues
- 🐛 App freezes or won't load
- 🐛 Auto radio function unreliable

**Reported bugs**

- App not alerting to incidents/calls
- Auto radio function not turning on
- Locked out of active departments after resigning from one
- App not loading after last update
- App not notifying phone or watch of pages

**Requested features**

- Add something for repeat addresses
- Add a feature to see who is available on the main screen
- Apple Watch app for availability status
- History of calls and attendance tracking
- Option to listen to different departments within the county


### MRF Tracking Viewer

[App page](https://appshunter.io/ios/app/mrf-tracking-viewer/id1468068457)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Who's Responding? free?

Who's Responding? is free to download, with no in-app purchases.

### Is MRF Tracking Viewer free?

MRF Tracking Viewer is free to download, with no in-app purchases.

### Do Who's Responding? or MRF Tracking Viewer have ads?

Neither Who's Responding? nor MRF Tracking Viewer shows ads.

### Which is updated more often, Who's Responding? or MRF Tracking Viewer?

Who's Responding? ships an update fortnightly, and MRF Tracking Viewer every 6 weeks. Most recently, Who's Responding? was updated on September 21, 2026 and MRF Tracking Viewer on September 13, 2026.

---

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