SITA eWAS vs VAAC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SITA eWAS
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.
- 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
Read full descriptionHide full description
Weather Awareness Service for your Electronic Flight Bag eWAS provides airline pilots a complete weather situation for their flights. The application presents the last observations and forecasts in an innovative horizontal and vertical view providing a clear 4D view with the time. eWAS data can be used at ground for a better flight preparation and even onboard the aircraft to receive continuous updates during the flight. Thanks to specific integration onboard the aircraft, data can be received by satellite and even by ACARS communication. New data format and compression allow eWAS to uplink forecast with a very limited bandwidth to limit the communication costs. ATC flight plan can be directly requested to the eWAS ground servers or copy paste from the flight folder. eWAS offers the following weather data: · Thunderstorm forecast and nowcast · Clear air turbulence · Icing · Volcanic Ash · Lightning · SIGMET · Pireps · Wind · Tropopause · METAR / TAF · And more data on request. Highly customizable, the application allows to define an airline policy with various options including the selections of various weather providers. Specific connection to the Airline OCC can also be requested to get for example flight plans and airports.
VAAC
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.
- Global volcanic ash advisories
- Selectable aviation centres
- ASHTAM and graphic formats
- On-demand information
- No intrusive notifications
Read full descriptionHide full description
Get alerts from Volcanic Ash Aviation Centres worldwide. Click on one or more centres you are interested in. Review latest activities in ASHTAM or graphic format. No annoying notifications, just get the info whenever you want and the area you are interested in. Available on iPhones and iPads.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | SITA eWAS | VAAC |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (10 ratings) — better | — |
| Positive reviews | 48.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 10 — better | — |
| Update frequency | Every 2 months — better | Every 11 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.3 | 9.3 — better |
| Further details — not scored | ||
| Size | 424 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | SITA EWAS APPLICATION SERVICES S.L. | Didier Delhaisse |
Customer experience
SITA eWAS
VAAC
In-app purchases
SITA eWAS
No in-app purchases
VAAC
- Remove ads$1.99









