Comparison

SITA eWAS vs VAAC

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read 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.

About

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.

Highlights
  • Global volcanic ash advisories
  • Selectable aviation centres
  • ASHTAM and graphic formats
  • On-demand information
  • No intrusive notifications
Features
Read 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

VAAC4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
SITA eWAS versus VAAC: the parameters behind the verdict, then further details
ParameterSITA eWASVAAC
PriceFreeFree
Rating4.1 (10 ratings) — better—
Positive reviews48.7% of reviews — better0.0% of reviews
Number of ratings10 — better—
Update frequencyEvery 2 months — betterEvery 11 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPadiPhone, iPad, iPod — better
Requires iOS16.39.3 — better
Further details — not scored
Size424 MB28 MB
Age rating4+4+
DeveloperSITA EWAS APPLICATION SERVICES S.L.Didier Delhaisse

Customer experience

SITA eWAS

All ratings10 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews39 reviews
Positive48.7%
Neutral7.7%
Negative43.6%

VAAC

Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

None

SITA eWAS

No in-app purchases

1 purchases

VAAC

One-time1
  • Remove ads$1.99

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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