A reflected light meter for film photographers shooting cameras with no meter. The iPhone camera is the sensor - nothing is photographed, saved or uploaded.
Light Meter₊ is coming soon to the App Store.
Camera - required. The camera is the light sensor: iOS exposes no ambient-light reading to apps, so the exposure is derived from the ISO, shutter and aperture the camera reports for the scene you point it at. Frames are read for those values and discarded. Nothing is photographed, recorded, or saved to your photo library.
Microphone - Shutter Check only. Fire a mechanical shutter at the phone and the app listens for the open and the close to time the speed the camera is actually giving you. iOS asks for the microphone the first time you use that feature, never at launch, and no audio is recorded or saved.
No location, no photo library, no contacts and no notifications are requested, and the app contains no networking code at all. The App Store privacy label is Data Not Collected.
Questions or bug reports: email support@pandataps.com, or use the contact form. Tell us your iPhone model and iOS version, what you were doing, and what you expected to happen.
Because the camera is the light sensor. iOS does not expose an ambient-light reading to apps, so the exposure is derived from the ISO, shutter and aperture the camera reports for the scene you are pointing at. Without camera access there is nothing to meter with, so the permission is required. Frames are read for those values and discarded - nothing is photographed or saved.
Only for Shutter Check, the feature that times a mechanical shutter by listening to it open and close. iOS asks for the microphone the first time you use that feature, not at launch, and no audio is recorded or saved. If you never use Shutter Check, you will never see the prompt, and the rest of the app works unchanged if you decline.
Yes, always. There is no networking code in the app, so every part of it works in airplane mode. There is no account to create and nothing to sign into.
On your iPhone, in a single file inside the app. Your camera profiles, calibration and logbook never leave the device. The App Store privacy label for the app is Data Not Collected.
iPhone, on iOS 17 or later.