Seamless fills
Great fill function, saves my composition. Also auto correct works perfectly.
Free
About
This app corrects perspective distortions and expands images using AI. It fills empty corners generated by perspective correction and extends image frames with generative AI. It also enhances resolution and preserves original color and HDR data.
✓Perspective and keystone correction
✓AI corner fill
✓Generative expand
✓Upscale and recreate images
✓Preserves Display P3 color and HDR
✓Maintains original metadata
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What's New in Keystone Photo Lab
1.4.1
October 1, 2026
New Warp tool, better tone tools, smoother gestures, Mac support • Brightness and Contrast rebuilt: highlights compress instead of blowing out, shadows lift without crushing, and dark areas no longer pick up colour noise. • New Brilliance tool: brightens dark parts of the photo and eases back the bright ones — for backlit buildings and flat, overcast light. • Saturation: isolate or exclude several colours in turn — each round adds to the last. White balance switches off with a second tap, and the sample point can be steered from anywhere on the photo. • Warp: a new Keystone tool that bends the inside of the photo while the edges stay put — for the small lens distortions left after perspective correction. Drag to push, turn the wheel to set the reach. • Bowed and warped HDR photos now save with their real HDR intact. • Auto crop understands bowed edges and keeps them out of the frame. • Crop gestures start from rest and move smoothly, with one consistent feel in Auto crop and Free crop. Zooming out lands edge to edge where your frame was. • On a Mac: pick photos from any folder, resize the window, and zoom and pan with the trackpad or mouse wheel. • Bug fixes and refinements.
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FAQ
What is Keystone Photo Studio?
Keystone Photo Studio is a photo editing application that specializes in correcting perspective distortions and using AI for image expansion and content generation. It aims to make photos look as if they were shot with a tilt-shift lens.
How does Keystone Photo Studio handle perspective correction?
It allows users to straighten converging verticals and fix keystone distortion in photos, particularly useful for architecture and real-estate shots. Users can tilt, rotate, and warp images until lines appear true.
What is AI Corner Fill in Keystone Photo Studio?
When perspective correction creates empty corners, Keystone Photo Studio uses generative AI to fill these spaces at the photo's full resolution. This ensures no downscaling, soft edges, or visible seams.
Can Keystone Photo Studio extend the boundaries of a photo?
Yes, the Generative Expand feature allows users to extend the frame beyond its original edges. AI can add sky, foreground, or breathing room that matches the existing scene.
Does Keystone Photo Studio preserve original photo quality and color?
Yes, it processes photos at full quality and preserves Display P3 wide-gamut color and HDR gain map end to end. It also saves in native HEIC/HEIF format, retaining EXIF and location metadata.
Is Keystone Photo Studio free to use?
Keystone Photo Studio is available for free. It offers optional auto-renewable subscriptions for additional monthly AI credits, which are charged to your Apple Account upon purchase.
Does Keystone Photo Studio have ads?
No, Keystone Photo Studio does not contain advertisements. The app is designed to be simple, fast, and private, with no account required to start editing.
What devices is Keystone Photo Studio compatible with?
Keystone Photo Studio is supported on iPhone and iPod devices. It is rated for ages 4 and up.
