Snowtam vs ATSU
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
Read full descriptionHide full description
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.
ATSU
This app provides comprehensive aviation tools for flight planning and operational support. It features AI-driven decision assistance, detailed runway analysis, and weather decoding to enhance pilot situational awareness and safety.
- AI-assisted aviation decision making
- Detailed runway and wind analysis
- Airport information and offline notes
- In-flight calculators and converters
- SIGMET plotting and weather charts
- NOTAM and METAR/TAF decoding
- Hands-free audio weather updates
Read full descriptionHide full description
Plan smarter with ATSU — the AI-powered flight briefing and EFB companion built for pilots. Get instant METAR, TAF, NOTAM, and SIGMET decoding, AI-assisted dispatch guidance, and every essential flight tool in one app. Flight Planning & Operational Support • ADA- AI Supported Aviation Decision Assistant introduced • Auto-generated Part A flight planning suggestions • Detects short and narrow runways, calculates maximum crosswind limits • Identifies weather-related threats during planning • Built-in Threat module for enhanced situational awareness Runway Intelligence • Detailed wind component analysis (headwind & crosswind) • Runway slope, elevation, surface type (ASP, CON) • Runway length, width, displaced threshold data Airport Essentials • Airport frequencies and airport maps • Offline/online note sharing with voting system for pilot feedback • In-Flight Tools • Approach path and temperature correction • Wind component calculator, fuel uplift calculator, logbook summation, unit converters ADA Suite (Airmet Detection & Awareness) • SIGMET plotting (thunderstorm, icing, turbulence, volcanic ash, and more) • Great circle flight planner • Prognostic and significant weather charts NOTAM & Weather Decoder • Smart NOTAM classification • METAR/TAF decoding • Runway condition/braking action decoder (ICAO and Russian formats) Meteogram • Visual meteogram charts showing weather trends and forecasts Drive Mode • Listen to latest METARs and TAFs • Audio mode similar to ATIS • Designed for hands-free use Night Time Calculator • Automatically calculates night flight time • Based on great circle route Dangerous Goods Module • Dangerous goods risk evaluation • Firefighting and spill procedures • Drill codes and additional safety considerations
Screenshots
Verdict
The clearest difference is review sentiment: ATSU at 97% against Snowtam's 43%. ATSU also leads on rating (5.0 vs 1.8) and update cadence (every 3 months vs every 7 months). Snowtam's advantage is chart position (#27 vs unranked) and iOS requirement (6.0 vs 18.0). On price, ratings volume, ads and in-app purchases 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
Snowtam costs $3.99 and ATSU $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ATSU holds the better App Store score, 5.0 against 1.8. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews point the same way: 43% of Snowtam's written reviews are positive against 97% of ATSU's.
Snowtam ships an update every 7 months, ATSU every 3 months. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.
| Parameter | Snowtam | ATSU |
|---|---|---|
| Price | $3.99 | $3.99 |
| Rating | 1.8 (5 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 43.5% of reviews | 97.4% of reviews — better |
| Number of ratings | 5 — better | 3 |
| Update frequency | Every 7 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #27 — better | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 6.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 3 MB | 52 MB |
| Age rating | 4+ | 4+ |
| Developer | Brendan Wholihan | Mehmet Tufan |
Customer experience
Snowtam
ATSU
In-app purchases
Snowtam
No in-app purchases
ATSU
No in-app purchases









