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Signal Light

By Bryan Wu

This app is only available on the App Store for iOS devices.


Note: Your device must have a flash to use this app!

This is a handy tool for campers, scouts, boaters, (and spies)!

Use it to communicate with distant friends using Morse code, tap out a beat for a human-powered strobe light, or get the attention of rescuers.

This app is based on a “signal lamp” which is a manually-controled shuttered spotlight used on warships to communicate securely while maintaining radio silence.

Modern navies still use signal lamps, but now use infrared wavelengths and night vision goggles!

Extra fun:

Put a paper towel tube on the flash to make a tight spotlight and you’ve got a line-of-sight communication tool that only you and your partner can see.

p.s. SOS is . . . – – – . . .

What's New in Version 1.0.1

- Added video preview to App Store
- Higher pitched tone (700Hz)

iPhone Screenshots

iPhone Screenshot 1
iPhone Screenshot 2
Signal Light
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  • $0.99
  • Category: Utilities
  • Updated:
  • Version: 1.0.1
  • Size: 25.0 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 7.1 or later. Compatible with iPhone, iPad, and iPod touch.

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