By WeatherFlow
Report updated Apr 17, 2026
HeatAlert: Heat Stress Index
For outdoor enthusiasts, athletes, and individuals seeking to monitor heat-related health risks in their immediate environment.
Overview · Full Intel report in progress
HeatAlert: Heat Stress Index is an established weather app that is completely free. With a 3.8/5 rating from 21 reviews, it shows polarized user reception.
What is HeatAlert: Heat Stress Index?
Current Momentum
v1.5 · 4mo ago
SteadyLast updated 132d ago. 5 versions tracked.
Competition
Rivals identification in progress
7-Day Rank Pulse 🇺🇸
WeatherNo ranking data
Rating Pulse 🇺🇸
What makes this app unique?
What Does It Look Like?
How Is The App's Momentum Right Now?
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What Are The Key Features?
Calculates Wet Bulb Globe Temperature using real-time data from nearby Tempest Weather Systems.
Provides localized forecasts including temperature, humidity, wind speed, and UV index.
Evaluates environmental conditions to help users assess and mitigate heat-related health risks.
How much does it cost?
Who Built It?
WeatherFlow
Providing hyper-local, hardware-backed weather intelligence for marine and outdoor enthusiasts through a proprietary global sensor network.
Portfolio
10
Apps
Who is WeatherFlow?
WeatherFlow has built a defensible moat by vertically integrating proprietary hardware—over 65,000 Tempest Weather Systems—with specialized forecasting models, moving beyond the commodity data used by general weather apps. Their strategy focuses on high-intent niche audiences where hyper-local wind precision is a safety and performance requirement rather than a convenience. By maintaining a suite of sport-specific titles instead of a single monolithic app, they capture targeted search traffic across distinct maritime communities while leveraging a shared data infrastructure.
Who is WeatherFlow for?
- Marine professionals
- High-stakes outdoor enthusiasts
- Sailors
- Kitesurfers
Portfolio momentum
The publisher maintains an exceptionally high development cadence with 33 updates across 9 active apps in the last six months and a recent release within 14 days.
What other apps does WeatherFlow make?
iWindsurf: Weather and Waves
Wind & Weather Meter
Vaavud Wind Meter
TempestOne Weather
Tempest Weather
FishWeather: Marine Forecasts
Analysis in progress, available soon
What do users think recently?
Analysis in progress, available soon
Analysis in progress, available soon
What is the competitive landscape for HeatAlert: Heat Stress Index?
How's The Weather Market?
How does it evolve in the Weather market?
| Country | Category | Chart | Rank | Change |
|---|---|---|---|---|
| 🇵🇭 Philippines | Weather | iOSFree | #92 | NEW |
Strategic analysis coming soon
SWOT, key takeaways & outlook
The outtake for HeatAlert: Heat Stress Index
Key Takeaways
HeatAlert provides hyper-local heat stress monitoring by integrating real-time data from the Tempest weather station network.
Where Is It Heading?
Trend analysis
Available very soon