# SITA eWAS vs VAAC

The clearest difference is review sentiment: SITA eWAS at 49% against VAAC's 0%. SITA eWAS also leads on in-app purchases (none vs 1) and update cadence (every 2 months vs every 11 months). VAAC's advantage is device support (3 vs 1) and iOS requirement (9.3 vs 16.3). On price, ads and monetization model there is nothing between them.

Both are free to download. VAAC sells 1 one-off in-app purchase. SITA eWAS asks for nothing beyond the download.

SITA eWAS ships an update every 2 months, VAAC every 11 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | SITA eWAS | VAAC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (10 ratings)](https://appshunter.io/ios/app/sita-ewas/id1005569119/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | **48.7% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 11 months |
| Monetization | Free | Free |
| Size | 424 MB | 28 MB |
| Requires iOS | 16.3 | **9.3** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SITA EWAS APPLICATION SERVICES S.L.](https://appshunter.io/developer/1393045789) | [Didier Delhaisse](https://appshunter.io/developer/1149960975) |

## What reviewers say

### SITA eWAS

[App page](https://appshunter.io/ios/app/sita-ewas/id1005569119)

This app offers pilots a comprehensive 4D weather view for flight planning and in-flight updates. It presents observations and forecasts horizontally and vertically, including thunderstorms, turbulence, icing, and volcanic ash. Data can be received via satellite or ACARS, with optimized bandwidth for cost savings.

**Highlights:** 4D weather visualization, Thunderstorm forecast & nowcast, Clear air turbulence & icing, Volcanic ash & lightning data, SIGMET, Pireps, Wind, Tropopause, METAR/TAF reports, Satellite & ACARS data reception

**Features:** macOS Compatibility

**In-app purchases:** none


### VAAC

[App page](https://appshunter.io/ios/app/vaac/id1149960976)

Receive alerts from Volcanic Ash Aviation Centres globally. Select your areas of interest to view the latest volcanic ash advisories in text or graphic formats. This app provides information on demand without intrusive notifications.

**Highlights:** Global volcanic ash advisories, Selectable aviation centres, ASHTAM and graphic formats, On-demand information, No intrusive notifications

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $1.99 | one-time |


## Frequently asked questions

### Is SITA eWAS free?

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

### Is VAAC free?

VAAC is free to download, with in-app purchases available.

### Do SITA eWAS or VAAC have ads?

Neither SITA eWAS nor VAAC shows ads.

### Which is updated more often, SITA eWAS or VAAC?

SITA eWAS ships an update every 2 months, and VAAC every 11 months. Most recently, SITA eWAS was updated on November 6, 2026 and VAAC on November 2, 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.*