# Prelim360 vs Disaster Aidvisor

The clearest difference is iOS requirement: Disaster Aidvisor at 13.0 against Prelim360's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Prelim360 ships an update every 2 months, Disaster Aidvisor every 3 months. The most recent releases landed on October 2, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Prelim360 | Disaster Aidvisor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 43 MB | 67 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Alcazar, LLC](https://appshunter.io/developer/1475483623) | [Build SOS Inc](https://appshunter.io/developer/1824295852) |

## What reviewers say

### Prelim360

[App page](https://appshunter.io/ios/app/prelim360/id6745491276)

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

**In-app purchases:** none


### Disaster Aidvisor

[App page](https://appshunter.io/ios/app/disaster-aidvisor/id6748238603)

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

**In-app purchases:** none


## Frequently asked questions

### Is Prelim360 free?

Prelim360 is free to download, with no in-app purchases.

### Is Disaster Aidvisor free?

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

### Do Prelim360 or Disaster Aidvisor have ads?

Neither Prelim360 nor Disaster Aidvisor shows ads.

### Which is updated more often, Prelim360 or Disaster Aidvisor?

Prelim360 ships an update every 2 months, and Disaster Aidvisor every 3 months. Most recently, Prelim360 was updated on October 2, 2026 and Disaster Aidvisor on October 19, 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.*