# MASD  Alerting vs Firefighter Shift Calendar

The clearest difference is in-app purchases: MASD  Alerting at none against Firefighter Shift Calendar's 2. MASD  Alerting also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Firefighter Shift Calendar sells 2 in-app purchases, starting at $4.99 per month. MASD  Alerting asks for nothing beyond the download.

## The numbers

| Metric | MASD  Alerting | Firefighter Shift Calendar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | — |
| Size | 65 MB | 74 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mach Alert Inc.](https://appshunter.io/developer/1472612618) | [Erdem Kara](https://appshunter.io/developer/1015700209) |

## What reviewers say

### MASD  Alerting

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

**In-app purchases:** none


### Firefighter Shift Calendar

[App page](https://appshunter.io/ios/app/firefighter-shift-calendar/id6767633074)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Monthly Subscription | $4.99 | per month |
| Premium - Yearly Subscription | $19.99 | per year |


## Frequently asked questions

### Is MASD  Alerting free?

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

### Is Firefighter Shift Calendar free?

Firefighter Shift Calendar is free to download, with in-app purchases available.

### Do MASD  Alerting or Firefighter Shift Calendar have ads?

Firefighter Shift Calendar shows ads; MASD  Alerting does not.

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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.*