Strike Analyzer - Lightning

How far away was that lightning strike?

Flash-to-bang, done right. Tap when you see the flash and tap when you hear

the thunder — or point the camera at the storm and let it measure hands-free.

⚡ STRIKE ANALYZER — Lightning Distance Calculator

👆 MANUAL MODE

One big glove-friendly button. Tap at the flash, tap at the thunder, get the

distance. Works anywhere, day or night, no permissions needed.

📷 AUTO MODE

The camera watches for the flash while the microphone listens for the thunder

onset, then pairs them automatically. Built to catch daylight bolts, not just

night storms — set the phone down and watch the sky.

📸 BOLT PHOTOS

Auto mode saves the exact camera frame that triggered detection — your

lightning photo, tagged with distance, time, and GPS location.

📈 STORM TREND

Consecutive strikes reveal whether the storm is approaching or moving away,

how fast, and roughly when it'll be overhead.

🗺️ LIVE RADAR MAP

Weather radar with real-time lightning strikes, centered on you. Zoom in on

your neighborhood or pan out to see the whole system moving through.

📒 STRIKE LOG

Every measurement is kept — distance, time, flash-to-bang, GPS pin — and

exports as CSV whenever you want it, your complete history, free or not.

🔬 THE SCIENCE

Distance comes from the temperature-corrected speed of sound (331.3 + 0.606×T

m/s), not a fixed constant — cold air carries thunder slower than warm air,

and that difference adds up over a few miles. Temperature comes from live

local conditions when location is on, or a standard 20°C/68°F otherwise.

Storm trend uses a least-squares regression across your last 30 minutes of

strikes rather than comparing the last two — a single stray reading can't

flip approaching to receding.

🔒 PRIVATE BY DESIGN

All flash and thunder detection runs entirely on your phone — your camera and

mic data never leave the device. Location is optional, used only to GPS-tag

photos, pull live temperature, and center the map on you.

💾 FREE VS PRO

Free includes full manual and auto detection, bolt photos, storm trend, the

live radar and lightning map, and CSV export of your complete history. The

in-app log view shows your last 5 strikes.

A one-time Pro purchase removes ads and unlocks your full strike history in

the log view — everything you logged while free unlocks retroactively.

No subscription. No account.

⚠️ LIGHTNING SAFETY FIRST

Strike Analyzer is not a safety device. Flash-to-bang distances are estimates

and can be wrong. Never use this app to decide whether it's safe to stay

outdoors.

If you can hear thunder, you're close enough to be struck. Follow the

National Weather Service guidance: When Thunder Roars, Go Indoors — and stay

there until 30 minutes after the last thunder.

🆘 SUPPORT

Email: [email protected]

Website: https://prodirt-llc.github.io/StrikeAnalyzer/

Made in Virginia, USA.