# IGT Mobile Responder vs Occupancy Alert

The clearest difference is update cadence: Occupancy Alert at fortnightly against IGT Mobile Responder's every 7 months. Occupancy Alert also leads on iOS requirement (9.0 vs 16.0). 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.

IGT Mobile Responder ships an update every 7 months, Occupancy Alert fortnightly. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | IGT Mobile Responder | Occupancy Alert |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Fortnightly** |
| Size | 16 MB | 65 MB |
| Requires iOS | 16.0 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [IGT](https://appshunter.io/developer/324561308) | [Digital Mortar, Inc.](https://appshunter.io/developer/1525040045) |

## What reviewers say

### IGT Mobile Responder

[App page](https://appshunter.io/ios/app/igt-mobile-responder/id1102629986)

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

**In-app purchases:** none


### Occupancy Alert

[App page](https://appshunter.io/ios/app/occupancy-alert/id1525040043)

**In-app purchases:** none


## Frequently asked questions

### Is IGT Mobile Responder free?

IGT Mobile Responder is free to download, with no in-app purchases.

### Is Occupancy Alert free?

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

### Do IGT Mobile Responder or Occupancy Alert have ads?

Neither IGT Mobile Responder nor Occupancy Alert shows ads.

### Which is updated more often, IGT Mobile Responder or Occupancy Alert?

IGT Mobile Responder ships an update every 7 months, and Occupancy Alert fortnightly. Most recently, IGT Mobile Responder was updated on November 2, 2026 and Occupancy Alert on November 7, 2026.

---

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