Comparison

Winter OPS vs SITA eWAS

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

Head to head
About

Winter OPS

This application assists with de-icing and anti-icing procedures by providing holdover time calculations based on official guidelines. It also decodes SNOWTAMs and offers customizable alerts for approaching expiry times, aiding aviation operations in winter conditions.

Highlights
  • Holdover Time (HOT) calculations
  • SNOWTAM decoding
  • Customizable expiry time alerts
  • Qualified fluid information
  • Weather definitions
  • Dark mode support
Read full description

Winter OPS supports aviation professionals during winter operations with fast access to Holdover Time information, De-/Anti-Icing guidance and SNOWTAM decoding — all in one purpose-built application. Configure the relevant operational conditions, select the applied fluid and quickly determine the corresponding Holdover Time (HOT). Compare available fluids at a glance and monitor the remaining HOT with configurable warnings and notifications. HOLDOVER TIMES: - Access Holdover Time (HOT) information based on supported FAA and Transport Canada guidance - Configure weather condition and precipitation intensity - Select outside air temperature in °C or °F - Configure fluid type and fluid/water mixture - Compare HOT values for available fluids at a glance - Consider operational parameters including wing surface, flap setting, precipitation speed and rotation speed - Display HOT start and end times using UTC, device time or countdown - Degree-Specific Holdover Times (DSHOT) available where permitted by your operator procedures HOT MONITORING: Keep track of your remaining Holdover Time during winter operations. Configure individual warning levels for: - Initial Warning - Last Warning - HOT Expiry DE-/ANTI-ICING REFERENCE: Quickly access useful operational reference information including: - One-step and two-step application guidelines - Application guidance by fluid and temperature - Qualified fluid information - Weather definitions - De-Icing and Anti-Icing terminology and definitions SNOWTAM & WINTER WEATHER: - Decode SNOWTAM information using the Global Reporting Format (GRF) - Snow intensity and visibility decoder - Present complex winter operations information in a clear and structured format DESIGNED FOR AVIATION OPERATIONS: Winter OPS is designed for pilots, flight operations, dispatch, ground operations and De-/Anti-Icing personnel who need relevant winter operations information without navigating through multiple documents and tables. The interface is optimized for quick access to operational information and can be configured according to individual requirements. Additional features include: - Light and Dark Mode - Configurable notification settings - UTC and local device time support - De-/Anti-Icing information sharing with Operations - Portrait support on iPhone - Portrait and landscape support on iPad DATA & GUIDANCE: Winter OPS uses Holdover Time data and guidance published for aircraft ground De-/Anti-Icing operations, including FAA and Transport Canada information and relevant EASA guidance. Applicable data is provided through annual subscriptions. Operators must always verify that the applicable data, procedures and winter season are approved for their operation. IMPORTANT: A subscription is needed for either all Fluids or Generic Fluids, available through in App Purchase or the respective individual Applications available in the AppStore. Winter OPS is an operational reference and support tool. It does not replace operator procedures, aircraft manufacturer documentation, applicable regulations or the professional judgement and responsibility of flight and ground personnel. Local authority requirements, operator documentation and aircraft-specific procedures must always be followed.

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.

Screenshots

Winter OPS4 screens

Verdict

The call

The clearest difference is review sentiment: SITA eWAS at 49% against Winter OPS's 0%. SITA eWAS also leads on in-app purchases (none vs 7) and update cadence (every 2 months vs every 8 months). Winter OPS's advantage is device support (3 vs 1). On price, ads and iOS requirement 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. Winter OPS sells 7 in-app purchases, starting at $7.49 per year. SITA eWAS asks for nothing beyond the download.

UpkeepUpdate frequency

Winter OPS ships an update every 8 months, SITA eWAS every 2 months. The most recent releases landed on September 12, 2026 and August 11, 2026 respectively.

Scorecard5 real differences · 5 level
Winter OPS versus SITA eWAS: the parameters behind the verdict, then further details
ParameterWinter OPSSITA eWAS
PriceFreeFree
Rating4.1 (10 ratings) — better
Positive reviews0.0% of reviews48.7% of reviews — better
Number of ratings10 — better
Update frequencyEvery 8 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS15.0 — better16.3
Further details — not scored
Size65 MB424 MB
Age rating4+4+
DeveloperAvimont GmbHSITA EWAS APPLICATION SERVICES S.L.

Customer experience

Winter OPS

Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

SITA eWAS

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

In-app purchases

7 purchases

Winter OPS

Subscriptions6
  • 1 year generic Fluids (FAA)14 Days trial$7.491 Year
  • 1 year generic Fluids (EASA)14 Days trial$7.491 Year
  • 1 year generic Fluids (TC)14 Days trial$7.491 Year
Show 3 more
  • 1 year all Fluids (FAA)$12.491 Year
  • 1 year all Fluids (EASA)$12.491 Year
  • 1 year all Fluids (TC)$12.491 Year
One-time1
  • Decoder Enabling$1.49
None

SITA eWAS

No in-app purchases

Questions

Is Winter OPS free?
Winter OPS is free to download, with in-app purchases available.
Is SITA eWAS free?
SITA eWAS is free to download, with no in-app purchases.
Do Winter OPS or SITA eWAS have ads?
Neither Winter OPS nor SITA eWAS shows ads.
Which is updated more often, Winter OPS or SITA eWAS?
Winter OPS ships an update every 8 months, and SITA eWAS every 2 months. Most recently, Winter OPS was updated on September 12, 2026 and SITA eWAS on August 11, 2026.

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