TongStudio EV Meter Pro

Light Meter is a pre-shoot exposure reference tool for iPhone.

It uses the iPhone camera preview to estimate scene brightness before you capture, helping you check whether the subject is too dark, highlights are at risk, or the current ISO, aperture, shutter, and metering mode need adjustment.

Key features:

- Real-time EV reference readings
- ISO, aperture, shutter, and metering mode controls
- Spot, center-weighted, and average metering modes
- Manual and automatic exposure modes
- Physical-style EV scale interaction
- Photo metering and optimized capture
- Cine metering with frame rate, shutter angle, and ND guidance
- Highlight risk, shadow risk, and exposure status checks
- Hold current reading
- Gray card calibration offset
- Meter log saving
- Text report and PNG report card export
- Multi-language settings

Light Meter is designed for photographers, video creators, interview setups, product shoots, and anyone who wants a quick exposure reference before shooting.

Important: Light Meter provides exposure reference only. It is not a certified, calibrated incident light meter and should not be used as a legal, safety, laboratory, medical, or certified measurement instrument. Readings may be affected by iPhone camera behavior, auto exposure, HDR, lens selection, and ambient conditions.

Privacy: Metering, photo capture, and video recording are processed locally on device. The app does not upload camera previews, photos, videos, microphone audio, location data, account data, or tracking data to developer servers.