Comparison

Flash Weather vs Nullschool

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

Head to head
About

Flash Weather

This app uses advanced AI to predict lightning strikes before they happen, offering real-time alerts and forecasts for outdoor safety. It also provides detailed hourly and 7-day weather outlooks, including temperature, precipitation, and heat stress information.

Highlights
  • AI-driven lightning prediction
  • Live lightning strike alerts
  • 5-hour lightning forecast
  • 18-hour future radar
  • Heat and WBGT forecasting
  • 7-day hourly and daily forecasts
  • Customizable proximity alerts
Features
Read full description

FLASH predicts lightning before the first strike. With a patented algorithm infused with Deep Learning, you'll always know when to head inside, and when it's safe to head back out. Whether you are outdoors for work, training, sports, or recreation, FLASH is your edge against the elements. LIGHTNING PREDICTION LIKE NEVER BEFORE Our patented algorithm, infused with deep learning, forecasts where lightning will be before it hits. - Live Activities let you track the storm from your Lock Screen - FirstStrike tells you when the strike will be in your backyard - All Clear gives a simple yes/no answer to "Can we go back outside?" - 5 Hour Lightning Forecast gives extra time to decide on afternoon & evening plans CURRENT AND FUTURE RADAR High resolution current and future radar with lightning, watches and warnings, plus Flash Weather's FirstStrike, All Clear, and Lightning Probability forecast maps. - Up to the minute current radar and current lightning - 18-hour future radar in 15-minute increments, updating hourly - FirstStrike, All Clear, and Lightning Probability maps updating every 2 minutes SMART PUSH NOTIFICATIONS Get alerted when lightning is detected or forecast near you. - Forecast-based warnings before a strike - Customizable lightning proximity alerts for every saved location NFHS-STANDARD, EXCLUSIVE HEAT AND WBGT FORECASTING Plan your day with real-time WBGT readings, critical for outdoor safety. FLASH also forecasts heat stress 7 days out so you can avoid dangerous conditions before they start. - Live WBGT values for your exact location - Heat risk color coding for easy interpretation - 7-day forward-looking heat stress outlook HOURLY AND 7-DAY FORECASTS High and low temperatures, precipitation chance and amount, wind, dew point, cloud cover, and UV index. - Hourly and daily forecasts out 7 days - Graphical temperature, precipitation, and wind outlooks Developed by Flash Weather. Learn more at flashweather.ai Questions or suggestions: support@flashweather.ai Some features require a Flash Premium subscription. After a 7-day free trial, Premium is $3.99/mo or $39.99/yr. Privacy Policy: https://flashweather.ai/privacy/ Terms of Service: https://flashweather.ai/legal/ Auto-renewable subscriptions are governed by Apple's standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Nullschool

Visualize global weather, ocean, and pollution data on an interactive map. Explore current conditions, forecasts up to 5 days, and historical data. Discover atmospheric phenomena like hurricanes, jet streams, and pollution spread.

Highlights
  • Interactive animated global map
  • Wind, ocean, and pollution layers
  • Current conditions and 5-day forecasts
  • Historical data access
  • Aurora and wildfire tracking
  • Subscription for extra features
Features
Currently charting
Read full description

The official app of the popular website earth.nullschool.net! Explore wind, weather, ocean, and pollution conditions, as forecast by supercomputers, on an interactive animated map. Numerous features are available: - Current conditions, forecasts up to 5 days (depending on the data source), and historical data going back many years - Physical layers: wind, temperature, relative humidity, wet bulb temperature, precipitation, MSLP, CAPE, and more - Chemistry and aerosol layers: PM 2.5, CO2, sulfate, and other pollutants - Ocean layers: waves, currents, swells, sea surface temps, coral bleaching - Aurora - Wildfires Explore Earth's atmosphere and oceans wherever your curiosity takes you: - Watch how hurricanes and typhoons form and pull heat from the ocean - See the jet stream and polar vortex - Follow the Kuroshio, Alguhas, and Gulf Stream - Learn how pollution spreads across the globe This app offers paid subscriptions so you can help Nullschool keep the lights on and develop new features. Plus, you get some neat extras: - Curate a gallery of favorites - Save and share screenshots - Generate QR codes for easy linking Who knows what you're going to find?

Screenshots

Flash Weather4 screens
Nullschool4 screens

Verdict

The call

The clearest difference is rating: Nullschool at 5.0 against Flash Weather's 4.4. Nullschool also leads on review sentiment (100% vs 65%). Flash Weather's advantage is update cadence (fortnightly vs monthly). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Flash Weather sells 2 in-app purchases, starting at $3.99 per month and Nullschool sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Nullschool holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 106 and 40 respectively. Written reviews point the same way: 65% of Flash Weather's written reviews are positive against 100% of Nullschool's.

UpkeepUpdate frequency

Flash Weather ships an update fortnightly, Nullschool monthly. Both last shipped on November 14, 2026.

Scorecard3 real differences · 8 level
Flash Weather versus Nullschool: the parameters behind the verdict, then further details
ParameterFlash WeatherNullschool
PriceFreeFree
Rating4.4 (106 ratings)5.0 (40 ratings) — better
Positive reviews64.6% of reviews100.0% of reviews — better
Number of ratings106 — better40
Update frequencyFortnightly — betterMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
Best chart rank#94 — better#136
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size77 MB31 MB
Age rating4+4+
DeveloperFlash Scientific TechnologyNullschool Technologies Inc.

Customer experience

Flash Weather

All ratings105 ratings
Positive83.8%
Neutral3.8%
Negative12.4%
Written reviews48 reviews
Positive64.6%
Neutral6.3%
Negative29.2%

Nullschool

All ratings27 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews17 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Flash Weather

Reported bugs

11 issues
  • App doesn't always load quickly or at all
  • Lightning feature won't load during storms
  • Metrics (humidity, UV) never appear
  • Radar not working
  • Radar and lightning maps not working
Show 6 more
  • Location shows incorrect state
  • App crashes every time it's opened
  • App won't open all the way then closes
  • Lightning distance less precise after upgrade
  • No alerts during severe thunderstorms
  • Account creation fails

Requested features

9 requests
  • Add notifications for advisories/warnings
  • Include a lightning counter with trend rate
  • Show UV rating, rain possibility, air quality in radar section
  • Make more features available without premium
  • Fix app crashing issues
Show 4 more
  • Improve location accuracy
  • Ensure radar and lightning maps are consistently working
  • Provide a way to sign up for premium on all devices
  • Offer ads instead of premium for basic features

Nullschool

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Flash Weather

Subscriptions2
  • Flash Premium Monthly7 Days trial$3.991 Month
  • Flash Premium Yearly7 Days trial$39.991 Year
3 purchases

Nullschool

Subscriptions3
  • Monthly Plan$2.991 Month
  • Annual Plan$29.991 Year
  • Friends of Nullschool$49.991 Year

Questions

Is Flash Weather free?
Flash Weather is free to download, with in-app purchases available.
Is Nullschool free?
Nullschool is free to download, with in-app purchases available.
Which has better reviews, Flash Weather or Nullschool?
Nullschool is rated higher. Flash Weather averages 4.4 out of 5 from 106 ratings, while Nullschool averages 5.0 from 40 ratings.
Do Flash Weather or Nullschool have ads?
Neither Flash Weather nor Nullschool shows ads.
Which is updated more often, Flash Weather or Nullschool?
Flash Weather ships an update fortnightly, and Nullschool monthly. Most recently, Flash Weather was updated on November 14, 2026 and Nullschool on November 14, 2026.
Which is more popular, Flash Weather or Nullschool?
Flash Weather currently peaks at #94 in the App Store charts, and Nullschool at #136. Chart position reflects recent download velocity rather than total install base.

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