Lensgrade

Lensgrade is an on-device photo keeper-check that helps you sort soft shots from sharp ones.

Choose a photo and Lensgrade scores it locally. It measures sharpness, then goes further: it finds the subject (a face, or a center region when there is no face) and scores focus there so a sharp portrait on a plain background stops reading soft. It builds a luminance histogram to flag clipped highlights and shadows, and it reads the photo's EXIF focal length and shutter speed to apply the reciprocal rule and estimate camera-shake risk. These signals combine into one clear keeper-or-cull verdict, with a breakdown showing exactly what produced the score.

A Shot Diagnosis card explains why a frame is soft — camera shake, focus miss, or extreme exposure — and gives a one-sentence fix. When EXIF is present it shows the actual shutter used versus the safe threshold with a stop-count delta, so you know exactly how far off the reciprocal rule you were. Focal length, 35mm equivalent, aperture, and ISO appear on every scored photo that carries metadata.

Batch a roll and Lensgrade ranks it sharpest-first, groups frames into bursts by capture time, and crowns the best frame in each. Your score history is searchable and sortable by sharpness, exposure, date, star, or keeper, and you can re-open saved batches as ranked groups or export any batch as a CSV. A Library Stats panel at the top of History shows your keep rate, average composite score, and a star-distribution bar so you can track how your shooting improves over time.

A bundled Learn tab adds a photo-quality glossary, how-to guides, a crop-factor table, typical score ranges by scene, and a new Field Lab with source-backed technique cards for shutter speed, focus maps, EXIF audits, histograms, depth of field, low-light triage, and burst culling. The Score and Batch tabs also include bundled sample photos, so you can try the real on-device analyzer without granting Photos access first.

Lensgrade analyzes the detail in delivered photos. It does not measure a lens's or camera's optical quality, and it never changes your library. Photos are selected by you and processed on device. No account, no ads, no analytics, no tracking, no in-app purchases.