Snowtam vs HemsWX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Snowtam
This app assists pilots in cold weather by decoding SNOWTAM and MOTNE reports. It also offers a tool to calculate cold temperature altitude adjustments based on Transport Canada's charts.
- SNOWTAM decoder
- MOTNE decoder
- Cold temperature correction tool
- ICAO airport code database
- Runway condition code decoding
- Altitude adjustment calculations
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Snowtam provides pilots with the following useful collection of tools for cold weather conditions: SNOWTAM decoder, MOTNE decoder and a cold temperature correction tool. * SNOWTAM decoder A quick and easy decoder for any of the 16 fields provided in a Snow Notification Report. * An in-built database with over 12,000 ICAO airport codes, together with elevation data (please consult application help page) * MOTNE decoder Runway condition MOTNE codes, which are provided with METARs, can quickly be decoded with an intuitive spin dial interface, ensuring that invalid codes cannot be entered. * Cold temperature corrections Based on Transport Canada's widely available Altitude Correction Chart, this utility uses a formula to quickly calculate cold temperature altitude adjustments. The application comes with detailed help information for each utility.
HemsWX
This weather system provides pilots with access to weather cameras, forecasts, and local measurements for mission planning. It is intended for use by partner organizations like emergency services and the military, with access granted through specific management channels.
- Access to weather cameras
- Weather forecasts from met.no
- Local pressure and temperature measurements
- Mission planning tools for pilots
- Partner access for emergency services
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The weather camera system HemsWX has been developed and financed by the Norwegian Air Ambulance Foundation, in close collaboration with Norsk Luftambulanse AS, and gives pilots access to their own weather cameras, webcams, weather forecasts from met.no and local pressure / temperature measurements for planning assignments. The app can, in this version, be used by partners such as helicopter operators, the Armed Forces, the emergency services and the Meteorological Institute. Employees at these must contact their own management for login info. Other individuals who believe they need access to HemsWX can apply for access to SNLA. The app is used at your own risk and by agreement with the developer.
Screenshots
Verdict
The clearest difference is price: HemsWX at Free against Snowtam's $3.99. HemsWX also leads on rating (4.0 vs 1.8) and update cadence (every 3 weeks vs every 7 months). Snowtam's advantage is chart position (#112 vs unranked) and ratings volume (5 vs 1). On ads, in-app purchases and device support 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
HemsWX is free to download; Snowtam costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
HemsWX holds the better App Store score, 4.0 against 1.8. That said, the two scores are not equally well evidenced: Snowtam has 5 ratings behind it against 1, so its average is the more settled of the two.
Snowtam ships an update every 7 months, HemsWX every 3 weeks. Both last shipped on November 6, 2026.
| Parameter | Snowtam | HemsWX |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 1.8 (5 ratings) | 4.0 (1 ratings) — better |
| Positive reviews | 43.5% of reviews | — |
| Number of ratings | 5 — better | 1 |
| Update frequency | Every 7 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #112 — better | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 6.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 3 MB | 145 MB |
| Age rating | 4+ | 4+ |
| Developer | Brendan Wholihan | Stiftelsen Norsk Luftambulanse |
Customer experience
Snowtam
HemsWX
In-app purchases
Snowtam
No in-app purchases
HemsWX
No in-app purchases









