Description:Photo Extension Histogram is a lightweight photo utility that brings professional histograms into the iOS Photos app. Instantly visualize luminance and RGB distribution to judge exposure, contrast, and color balance without leaving your editing workflow.
Core features: real-time luminance and RGB histograms with highlight and shadow clipping cues; seamless Photos extension for one-tap analysis of HEIF, JPEG, and RAW photos; fast, offline, and privacy-friendly design made for photographers and creators who need accurate exposure analysis on iPhone and iPad.
How to use:1. Download and install the app from the App Store.
2. Open the Photos app, choose a photo, and tap Edit.
3. Tap the extensions button or the More option, enable Photo Extension Histogram if prompted, then select it to open.
4. Read the histogram to assess exposure. Switch between RGB and luminance views if available, and use clipping indicators to spot blown highlights or crushed shadows.
5. Repeat with other images to compare results. Open RAW, HEIF, or JPEG photos the same way to analyze them within Photos.