Photosynthesis Fuses Two iPhone Lenses Into One Photo, With No Generative AI

Photosynthesis, a new camera app for iPhone, captures from two lenses at the same time and combines the results into one high-resolution photo. Its tagline is "Zoom and enhance. For real this time," and the developers stress that no generative AI is involved: every pixel of detail comes from the camera's own optics.

How it works

On a two-lens iPhone the app pairs the main camera with the ultra-wide lens, a 1x + 0.5x combination; on three-lens Pro models, which also have an optical zoom lens, users can pick the 1x + zoom pairing instead, or combine all three lenses in a feature that is currently in beta. Brackets in the viewfinder indicate the part of the frame covered by the more detailed lens, so a subject can be framed inside them. One press of the shutter fires both lenses simultaneously, which allows a combined capture even when the subject is moving; the app then matches alignment and colour between the two images automatically.

Editing and exports

The built-in editor offers the standard adjustments — exposure, contrast, highlights, shadows, white point and black point — alongside cropping with aspect-ratio presets, rotation, flipping, straightening and alignment. A dedicated tool lets users tweak the alignment of the inner lens and paint over artifacts such as ghosting or doubled subjects. Finished photos can be exported to the Photos library or to other apps in several formats, including a layered Photoshop document, a spatial photo and a side-by-side 3D image, while a custom Photosynthesis file preserves layers and edits for re-importing later.

Pricing and supported iPhones

The app supports every iPhone with two or three rear lenses from the iPhone 11 onwards. The free tier unlocks everything for the first 14 days; after that, capture and in-app editing remain unlimited, while exports of finished image files from outside the app are limited to five per month, with optional iCloud backup. Two paid options remove the limits: a monthly or yearly subscription, and a one-time lifetime unlock that also adds custom themes and app icons and automatic backup to a folder of the user's choosing.

Not Deep Fusion

Asked how this differs from Apple's Deep Fusion, which fuses several frames taken by the same lens to reduce noise, the developers say Photosynthesis blends complete photos taken by two different lenses, so the detail in the centre of the frame comes optically from the closer lens rather than from a cleaner version of the same view.