A strobe light in your pocket. Pick the rate, and go.

Strobe turns your iPhone's flashlight into a strobe light. Pick a frequency from 1 to 50 Hz with a wheel picker, tap on, and the torch flashes at that rate until you tap it off.

One screen, one control

There's nothing to configure beyond the frequency itself. Spin the picker to the rate you want — anywhere from a slow 1 Hz pulse to a fast 50 Hz flicker — and tap the button to start. Change the frequency while it's running and the strobe retunes immediately, no need to stop first.

Built around the flashlight, not the camera

Strobe only ever touches the device's torch hardware directly. It never opens the camera, so there's no camera permission prompt, no preview, and no camera access of any kind — just the flashlight, switching on and off.

Black and mustard

The whole screen swaps between black and a fixed mustard-yellow the moment you start strobing, so you can tell at a glance — even from across the room — whether it's running.

No ads. No account. No tracking.

Free, with no subscriptions and no ads anywhere in the app.
Nothing to sign up for. There is no account of any kind.
No analytics, no tracking, and no network access at all — Strobe doesn't talk to the internet.

A note on flashing light

Strobe produces a rapidly flashing light by design. If you or anyone nearby is photosensitive — including people with photosensitive epilepsy — avoid looking directly at the strobe, especially at higher frequencies, and stop immediately if you feel unwell.