Thunder Distance: Storm Calc
Lightning Distance Tracker
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Archived App (Last seen on 15 May 2026)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
About
Thunder Distance+ calculates how far away lightning is by timing the gap between the flash and the thunder. Tap when you see lightning, tap again (or let the microphone auto-detect) when you hear thunder.
Track multiple strikes to see if the storm is approaching or retreating, and get 30-30 rule safety alerts.
Key Features:
- Flash-to-thunder distance calculation
- Auto thunder detection via microphone
- Storm approach/retreat tracking
- 30-30 safety rule alerts
- Temperature-compensated sound speed
- Storm timeline with distance history
- Multi-strike tracking
Stay safe during thunderstorms. Know how far the lightning is.
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What's New in Thunder Distance
1.0
April 1, 2026
