# MASD  Alerting vs Shield Shift Tracker

The clearest difference is in-app purchases: MASD  Alerting at none against Shield Shift Tracker's 1. MASD  Alerting also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.0). Shield Shift Tracker's advantage is update cadence (every 2 days vs every 13 months). On price and ads there is nothing between them.

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

MASD  Alerting ships an update every 13 months, Shield Shift Tracker every 2 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | MASD  Alerting | Shield Shift Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/shield-shift-tracker/id6755852365/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 65 MB | 8 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mach Alert Inc.](https://appshunter.io/developer/1472612618) | [Corey Gillespie](https://appshunter.io/developer/1796727084) |

## What reviewers say

### MASD  Alerting

[App page](https://appshunter.io/ios/app/masd-alerting/id1629039048)

**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 MASD  Alerting free?

MASD  Alerting 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.

### Do MASD  Alerting or Shield Shift Tracker have ads?

Neither MASD  Alerting nor Shield Shift Tracker shows ads.

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

MASD  Alerting ships an update every 13 months, and Shield Shift Tracker every 2 days. Most recently, MASD  Alerting was updated on November 3, 2026 and Shield Shift Tracker on October 30, 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.*