Freeze the motion
A fast shutter holds the spray in mid-air. The settings you can use depend on the light, your camera and your lens.

Obtura · Light meter & camera coach
Obtura helps iPhone photographers plan, take and improve photos with visual guides. It also gives manual and film camera users light-meter readings and suggested settings.
Available now on the App Store.
iPhone · iOS 26 or later · English and French. The photography tools remain usable without Apple Intelligence. Compatibility

A fast shutter holds the spray in mid-air. The settings you can use depend on the light, your camera and your lens.

A long exposure lets the water’s movement show. Obtura also explains the scene’s limits and the need to keep the camera steady.

These are generated illustrations of photographic intentions, not photographs taken with Obtura or captures of its previsualisation.
Your iPhone measures the light reflected by the scene. Obtura then calculates settings for your film speed, lens and camera’s shutter ladder.
In plain words. “Freeze the tackle.” “Silky water.” “Keep the background soft.” No exposure jargon required — that half of the job is the app's.
The settings to dial in, and a simulated preview of the frame they'll give you. Change your mind before you spend the shot.
On-device intelligence
On a compatible iPhone with Apple Intelligence, Apple’s on-device model interprets English requests. French uses keyword parsing and a curated coaching library; preset coaching also keeps the app useful when the model is unavailable. Exposure settings are always calculated from the metered light and your camera’s real dials. Your sentence stays on the phone.
English model coaching on supported devices; curated coaching when unavailable and in French. Works offline.
The same light and the same lens always give the same answer.
Your prompt and photographs are processed on your iPhone.
The instrument
Dark from edge to edge, one-handed, tabular numerals. The raw EV stays on screen at all times, so you can check the app against your own judgement — and calibrate it to the body you trust.
Your lens's real aperture range and click step. Your body's shutter ladder. If f/1.7 isn't on your lens, Obtura will never suggest it.
Metering, intent and the solver all run on the device. No signal needed on the mountain, in the darkroom, or on the plane.
Set the film sensitivity and dial steps in your profile. For long exposures on film, consult the film maker’s reciprocity guidance separately: Obtura does not automatically apply that correction.
Log your shots with their settings, intent, a reference frame and location. Return to your notes when the scans come back.
Privacy
No account. No analytics SDK in the app. No tracking, no advertising identifier. Obtura never sends Nesia your photographs, camera profiles, journal or the sentences you speak. Apple may restore that app data from your encrypted device backup. Apple takes the payment; an anonymous receipt is the only thing our purchase provider receives, without your name or email address.
Metering is free and unlimited, forever — and so are previsualisation, the shot journal, calibration and your camera profiles. The one thing Pro changes is coaching: three coached shots per rolling seven days without it, unlimited with it, as a monthly or annual subscription or a one-time lifetime purchase. Prices are shown in the App Store.
Available on the App Store
Download on the App Store →