Comparison

Thunderly vs Flash Weather

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

Head to head
About

Thunderly

Visualize real-time lightning strikes globally on an interactive map. Explore weather data like clouds and precipitation, and measure distances to storms. You can even simulate lightning flashes with your camera.

Highlights
  • Real-time global lightning map
  • Accurate day/night cycle
  • Real-time clouds and precipitation layers
  • Lightning history layer (last hour)
  • Zoomable map detail
  • Storm distance measurement
  • Simulated lightning flashes
Features
Read full description

Do you love storms as we do? Then you’ll love our app. At photorealistic globe you can see real time lightning all around the world. Besides accurate day and night cycle, globe contains real time clouds, precipitation and lightning history layer for last hour. For better resolution you can zoom into map detail. If you zoom really closely to your location, you can use start-stop feature to measure your distance from nearby storm. When no storm is close enough, feel free to “stream” lightnings via your camera flash from opposite side of the world to your living room. ...and one more thing: If you try hard enough we are pretty sure that you’ll find switch for real time aurora. Not as cool as lightning, but also kind of amazing!

About

Flash Weather

Get precise, AI-powered weather alerts for lightning, heat risk, and radar. Receive instant notifications tailored to your location, with customizable settings for safety and planning outdoor activities. Includes hourly and 7-day forecasts.

Highlights
  • AI lightning prediction
  • Real-time heat risk metrics
  • Current and future radar maps
  • Smart push notifications
  • Hourly and 7-day forecasts
  • Customizable warning settings
Features
Currently charting
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/

Screenshots

Thunderly4 screens
Flash Weather4 screens

Verdict

The call

The clearest difference is in-app purchases: Thunderly at none against Flash Weather's 2. Thunderly also leads on ratings volume (2.6K vs 104) and iOS requirement (11.0 vs 15.0). Flash Weather's advantage is chart position (#116 vs unranked). On price, rating, review sentiment and update cadence 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. Thunderly asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.3 for Thunderly against 4.4 for Flash Weather. That said, the two scores are not equally well evidenced: Thunderly has 2.6K ratings behind it against 104, so its average is the more settled of the two. Written reviews are what separate them: 58% of Thunderly's written reviews are positive against 65% of Flash Weather's.

UpkeepUpdate frequency

Thunderly ships an update every 3 weeks, Flash Weather fortnightly. The most recent releases landed on October 22, 2026 and October 20, 2026 respectively.

Scorecard4 real differences · 7 level
Thunderly versus Flash Weather: the parameters behind the verdict, then further details
ParameterThunderlyFlash Weather
PriceFreeFree
Rating4.3 (2.6K ratings)4.4 (104 ratings) — better
Positive reviews57.7% of reviews64.6% of reviews — better
Number of ratings2.6K — better104
Update frequencyEvery 3 weeksFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
Best chart rank—#116 — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS11.0 — better15.0
Further details — not scored
Size113 MB72 MB
Age rating4+4+
DeveloperJan PlesekFlash Scientific Technology

Customer experience

Thunderly

All ratings2,596 ratings
Positive82.1%
Neutral5.4%
Negative12.6%
Written reviews137 reviews
Positive57.7%
Neutral7.3%
Negative35.0%

Flash Weather

All ratings103 ratings
Positive84.5%
Neutral3.9%
Negative11.7%
Written reviews48 reviews
Positive64.6%
Neutral6.3%
Negative29.2%

Bugs and requests

Thunderly

Reported bugs

4 issues
  • App crashes on launch
  • Globe not rendering properly
  • Lightning data not updating in real-time
  • Incorrect lightning strike detection

Requested features

5 requests
  • Add ability to track past lightning strikes
  • Implement distance/location-based alerts
  • Include weather data and radar
  • Add support for landscape mode and iPad
  • Provide more customization options

Flash Weather

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Thunderly

No in-app purchases

2 purchases

Flash Weather

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

Questions

Is Thunderly free?
Thunderly is free to download, with no in-app purchases.
Is Flash Weather free?
Flash Weather is free to download, with in-app purchases available.
Which has better reviews, Thunderly or Flash Weather?
Flash Weather is rated higher. Thunderly averages 4.3 out of 5 from 2.6K ratings, while Flash Weather averages 4.4 from 104 ratings.
Do Thunderly or Flash Weather have ads?
Neither Thunderly nor Flash Weather shows ads.
Which is updated more often, Thunderly or Flash Weather?
Thunderly ships an update every 3 weeks, and Flash Weather fortnightly. Most recently, Thunderly was updated on October 22, 2026 and Flash Weather on October 20, 2026.

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