# Thunder Distance: Storm Calc — Lightning Distance Tracker

> Lightning Distance Tracker (iPhone/iPad app by Kyu-Hee Jang.)

- Source: https://appshunter.io/ios/app/thunder-distance/id6761255141 (this page in markdown: same URL + `.md`)
- Developer: [Kyu-Hee Jang](https://appshunter.io/developer/1587578867)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 17+
- Requires: iOS 15.1 · 31 MB
- Languages: American English
- Released: 2026-03-31
- Data updated: 2026-05-15
- User reviews in markdown: https://appshunter.io/ios/app/thunder-distance/id6761255141/reviews.md

## What is Thunder Distance?

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.


## Version history (last 1 release)

### 1.0 — 2026-04-01

No release notes.

## More apps by Kyu-Hee Jang

- [Calculator+: Easy Math Tool](https://appshunter.io/ios/app/calculator/id1587591476)
- [QR Lens+ Barcode Scanner Pro](https://appshunter.io/ios/app/qr-lens-barcode-scanner-pro/id1590631012)
- [Sound Noise Meter+ dB SPL](https://appshunter.io/ios/app/sound-noise-meter-db-spl/id1593197145)
- [Tremor Vibration Meter](https://appshunter.io/ios/app/tremor-vibration-meter/id6759666731)
- [Lux Light Meter - Luminance](https://appshunter.io/ios/app/lux-light-meter/id6759858193)
- [Barometer: Air Pressure](https://appshunter.io/ios/app/barometer/id6759883097)

All apps by Kyu-Hee Jang: https://appshunter.io/developer/1587578867

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-15.*