Signal Light is made and published by Bryan Wu. AppBrain is an independent app data site and isn't affiliated with Bryan Wu. The app name, icon, screenshots and description belong to Bryan Wu and are shown as published on the App Store.

About Signal Light

Signal Light is an utilities app developed by Bryan Wu.

What is the rating of Signal Light?

Signal Light is rated 4.00 out of 5 stars, based on one rating ratings.

Is Signal Light free?

Signal Light costs $0.99. The app size is 20.85 MB. The latest version available is 1.0.5. The last update was on May 28, 2026.

What are the requirements for Signal Light?

The app has a content rating of Everyone. The app has been available on the App Store since November 2015.

Description by Bryan Wu (from the App Store)

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

Camper, Sailor, Soldier, Spy

A handy tool for campers, scouts, boaters (and yes, 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 the old mechanical “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 . . . – – – . . .

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More data about Signal Light

Price	$0.99
Rating	4.00 based on a single rating
Ranking	Not ranked
Version	1.0.5
App size	20.8 MB
Suitable for	Everyone

Screenshots

Screenshots by Bryan Wu, from the the App Store listing

Official page on the App Store

Alternatives to Signal Light

Changelog of Signal Light

No changelog data

Developer information for Bryan Wu

Bryan Wu

Address:

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App Store Rankings for Signal Light

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Technologies used by Signal Light

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Signal Light