# UseIRIS vs Shield Shift Tracker

The clearest difference is rating: Shield Shift Tracker at 5.0 against UseIRIS's 3.8. Shield Shift Tracker also leads on update cadence (every 2 days vs every 24 months). UseIRIS's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Shield Shift Tracker sells 1 one-off in-app purchase. UseIRIS asks for nothing beyond the download.

Shield Shift Tracker holds the better App Store score, 5.0 against 3.8. Both are backed by a comparable volume of ratings — 6 and 2 respectively.

UseIRIS ships an update every 24 months, Shield Shift Tracker every 2 days. The most recent releases landed on September 28, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | UseIRIS | Shield Shift Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (6 ratings)](https://appshunter.io/ios/app/useiris/id1363192543/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/shield-shift-tracker/id6755852365/reviews)** |
| Number of ratings | **6** | 2 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 2 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 12 MB | 8 MB |
| Requires iOS | **10.3** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Techradium, Inc.](https://appshunter.io/developer/1363192542) | [Corey Gillespie](https://appshunter.io/developer/1796727084) |

## What reviewers say

### UseIRIS

[App page](https://appshunter.io/ios/app/useiris/id1363192543)

This app enables administrators to send mass notifications via text, voice, or recorded alerts. Recipients can view and listen to recent messages and respond to emergency alerts if the 'needs assistance' feature is enabled.

**Highlights:** Broadcast messages via text, voice, or recorded alerts, Deliver messages via SMS, phone calls, and email, View alert delivery reports, Access last ten received alerts, Respond to emergency alerts with assistance status

**Features:** macOS Compatibility

**In-app purchases:** none


### Shield Shift Tracker

[App page](https://appshunter.io/ios/app/shield-shift-tracker/id6755852365)

Manage your demanding work schedule with a dedicated shift calendar. Track overtime, log shift trades, and visualize your entire rotation at a glance. Ideal for first responders with complex schedules.

**Highlights:** Customizable shift calendar, Overtime tracking, Shift trade logging, Monthly and weekly schedule views, Color-coded day types, Calendar export

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | one-time |


## Frequently asked questions

### Is UseIRIS free?

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

### Is Shield Shift Tracker free?

Shield Shift Tracker is free to download, with in-app purchases available.

### Which has better reviews, UseIRIS or Shield Shift Tracker?

Shield Shift Tracker is rated higher. UseIRIS averages 3.8 out of 5 from 6 ratings, while Shield Shift Tracker averages 5.0 from 2 ratings.

### Do UseIRIS or Shield Shift Tracker have ads?

Neither UseIRIS nor Shield Shift Tracker shows ads.

### Which is updated more often, UseIRIS or Shield Shift Tracker?

UseIRIS ships an update every 24 months, and Shield Shift Tracker every 2 days. Most recently, UseIRIS was updated on September 28, 2026 and Shield Shift Tracker 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.*