Comparison

Hazard Notifier vs Skywatch BL

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

Head to head
About

Hazard Notifier

Receive timely alerts for a wide range of potential hazards, including severe weather, natural disasters, and even space events. Customize notification ranges and types, and contribute to community safety by reporting emerging incidents.

Highlights
  • Customizable notification range and hazard types
  • Real-time hazard tracking on a map
  • User reporting of emerging events
  • Push notifications for critical alerts
  • Wide range of hazard categories including weather and natural disasters
  • Reporting statistics for users
Features
Read full description

Hazard Notifier is a unique, highly customizable application, specifically developed to deliver information concerning potentially unsafe events in a simple yet straightforward way. With push notifications and distinctive sounds, Hazard Notifier sends the information you want to know directly to your phone, clearly and informatively. All you have to do is open the application and you can immediately watch and track developing hazards on a map in relation to your location. With weather radar and hazard icons, you will be able to see exactly what is going on and where. When using the application, you are completely free to adjust the range of the area in which you wish to receive notifications, as well as choose what kind of hazards you would like to be notified of. In addition, Hazard Notifier’s exclusive reporting service allows users to report events that have just begun to occur around them, which can help notify others about possibly unsafe events before they have even been formally declared. This application is not just limited to reporting weather. Hazard Notifier reports events involving: • Tornadoes • Severe Thunderstorms • High Winds • Hail • Lightning • Flooding • Heavy Rain • Snow • Freezing Rain • Ice • Dense Fog • Dust Storms • Fire • Hurricanes • Tropical Storms • Earthquakes • Tsunamis • Volcanoes • Debris Flow • Asteroids With Hazard Notifier, you will not have to spend as much time sifting through slews of disorganized information on the latest environmental events from news programs and web pages. Hazard Notifier will clearly display events in relation to where you are. If you find yourself wishing to stay informed of turbulent conditions, yet are unable to actively access the latest weather or news reports, Hazard Notifier will send you push notifications of potentially unsafe events in your area.

About

Skywatch BL

This app connects to compatible weather stations via Bluetooth to display real-time environmental data. View measurements, history, and map displays with customizable units and modes. Supports multiple device models and offers online firmware updates.

Highlights
  • Real-time measurements
  • Graphical display
  • Measurement history
  • Map display
  • Customizable units
  • Multiple device support
Features
Read full description

The Skywatch BL is a complete weather station connected to your smartphone via Bluetooth Low Energy (BLE) and uses the Bluetooth Environmental Sensing Profile (ESP). Measurements are transferred to your smartphone and may be viewed or uploaded and stored online. This application supports the BL300, BL400, BL500 and BL1000: BL300: wind speed, temperature, humidity BL400: wind speed, temperature, humidity, pressure BL500: wind speed, temperature, humidity, pressure, UV index BL1000: wind speed, wind direction, temperature, humidity, pressure General features: • Real-time measurements • Graphical display of measurements • Measurement history • Display of measurements on a map • Wind speed units: km/h, m/s, fps, mph, knots, Beaufort • Temperature units: °C, °F • Pressure units: hPa, mbar, inHg • Modes: instant, minimum, maximum, average • Compatible Bluetooth Smart (BLE) 4.0 and newer. • Bluetooth Environmental Sensing Profile (ESP) and Environmental Sensing Service (ESS) • Online firmware update of the device • Menu languages: English, French Skywatch BL 300 features: • Windspeed • Temperature, wind chill • Humidity, dew point and heat index Skywatch BL 400 features: • Windspeed • Temperature, wind chill • Humidity, dew point and heat index • Pressure (QFE, QNH), altitude Skywatch BL 500 features: • Windspeed • Temperature, wind chill • Humidity, dew point and heat index • Pressure (QFE, QNH), altitude • UV index BL1000 features: • Windspeed, wind direction • Temperature, wind chill • Humidity, dew point and heat index • Pressure (QFE, QNH), altitude

Screenshots

Hazard Notifier4 screens
Skywatch BL4 screens

Verdict

The call

The clearest difference is review sentiment: Hazard Notifier at 50% against Skywatch BL's 0%. Skywatch BL's advantage is in-app purchases (none vs 1) and iOS requirement (14.0 vs 17.0). On price, update cadence, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Hazard Notifier sells 1 one-off in-app purchase. Skywatch BL asks for nothing beyond the download.

UpkeepUpdate frequency

Hazard Notifier ships an update every 2 months, Skywatch BL every 3 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard4 real differences · 6 level
Hazard Notifier versus Skywatch BL: the parameters behind the verdict, then further details
ParameterHazard NotifierSkywatch BL
PriceFreeFree
Rating3.8 (8 ratings) — better—
Positive reviews50.0% of reviews — better0.0% of reviews
Number of ratings8 — better—
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.014.0 — better
Further details — not scored
Size48 MB18 MB
Age rating4+4+
DeveloperITDT LLCJDC Electronic SA

Customer experience

Hazard Notifier

All ratings8 ratings
Positive62.5%
Neutral12.5%
Negative25.0%
Written reviews8 reviews
Positive50.0%
Neutral25.0%
Negative25.0%

Skywatch BL

Written reviews6 reviews
Positive0.0%
Neutral16.7%
Negative83.3%

In-app purchases

1 purchases

Hazard Notifier

One-time1
  • Ad-Free Version$0.99
None

Skywatch BL

No in-app purchases

Questions

Is Hazard Notifier free?
Hazard Notifier is free to download, with in-app purchases available.
Is Skywatch BL free?
Skywatch BL is free to download, with no in-app purchases.
Do Hazard Notifier or Skywatch BL have ads?
Neither Hazard Notifier nor Skywatch BL shows ads.
Which is updated more often, Hazard Notifier or Skywatch BL?
Hazard Notifier ships an update every 2 months, and Skywatch BL every 3 months. Most recently, Hazard Notifier was updated on November 1, 2026 and Skywatch BL on November 2, 2026.

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