Color Flashlight
SOS Flashlight: Signal for Help With Your Phone
Short answer: SOS in Morse code is three short flashes, three long, three short (··· ––– ···) — and the last thing you want in an emergency is to hand-time it with a flashlight toggle. ScreenFlash's SOS mode flashes the standard pattern automatically, at full screen brightness, in the color that carries best, until you stop it.
Why a visual SOS still matters
Phones have made rescue easier, but there's a gap between "help is coming" and "help can see you." Search teams, drones, boats and passing vehicles find people by sight, especially at night. A regularly repeating light pattern reads as unmistakably human — random waving of a flashlight doesn't. That's why the fixed SOS rhythm has survived a century: it's instantly recognizable and requires zero shared language.
Flash SOS from your iPhone
- Install Color Flashlight – ScreenFlash free — do it today, not on the trailhead with one bar of signal.
- Open the app, swipe up to Effects, tap SOS.
- The screen flashes the international pattern with correct timing, on repeat, with the wakelock keeping it alive.
- Point the screen toward roads, water or sky lines; prop the phone high if you can't hold it.
Make your signal count
- Color: white carries farthest; red reads as "emergency" and preserves your own night vision while you wait.
- Position: light travels line-of-sight — a ridge, window or car roof beats a gully floor.
- Battery: before signaling all night, drop into Low Power Mode, kill other apps, and consider alternating 10 minutes on / 5 off if power is low.
- Pair strategies: phone SOS toward the likely search direction, whistle bursts of three (the audio equivalent) toward everything else.
Practice once, thank yourself later
Run the SOS mode for ten seconds at home so you know exactly where it lives. While you're in the Effects panel you'll also find the adjustable strobe — the 500–1000 ms setting doubles as a roadside breakdown blinker — and every color tool from full RGB control to saved presets.
Frequently asked questions
What does SOS look like in flashes?
Three short, three long, three short (··· ––– ···), pause, repeat — recognized worldwide.
Is a phone screen visible far enough to matter?
At night in open terrain, hundreds of meters — more with elevation. It costs little battery and works where voices don't.
Does this replace calling emergency services?
No — call (or satellite-SOS) first. The beacon helps searchers pinpoint you.