Flashlight strobe light for iPhone

Support

Email iaroslav.grytsyna@gmail.com — a real person reads it.

If the torch won't start, the rate looks off, or anything on screen looks wrong on your device, that's exactly what's useful to hear about. Send what you expected and what happened instead.

Using Strobe

Spin the wheel picker to choose a frequency from 1 to 50 Hz, then tap the button to turn the torch on. It flashes at that rate until you tap the button again to turn it off. You can change the frequency at any time, even while it's running — it retunes immediately, no need to stop first.

Reading the screen

The screen is black while off and switches to mustard-yellow the moment strobing starts, so you can tell its state at a glance.

"Torch is not available on this device"

Strobe needs a physical flashlight (torch) to work. This message appears on devices with no torch hardware — for example iPads, or the iOS Simulator. On an iPhone with a working flashlight, this should not appear; if it does, please get in touch.

Known limits

High frequencies are best-effort. Above roughly 10–15 Hz, the hardware's own switching latency means the real flicker rate can drift slightly from the number shown — this is a hardware limit, not a bug.
The torch can warm up. Running a high frequency for a long stretch keeps the LED driven hard and can noticeably warm the device. If that happens, just turn it off for a bit.
Stops when you leave the app. The torch switches off automatically if you background the app or lock your phone, so it never keeps flashing unattended.

Something is wrong

Email iaroslav.grytsyna@gmail.com. Useful things to include: your device and iOS version, the frequency you had set, what you expected, and what happened instead.