Keystone Photo Studio

Simple but powerful tool to fix perspective distortions, AI corner fill, generative expand, upscale and deliver results in full resolution, P3 color and native HDR.

PERSPECTIVE & KEYSTONE CORRECTION Straighten converging verticals and fix keystone distortion in architecture, real-estate, and street photos. Tilt, rotate, and warp until every line is true.

AI CORNER FILL — AT FULL RESOLUTION Correcting perspective leaves empty corners. Keystone fills them with generative AI at your photo's full resolution — no downscaling, no soft edges, no visible seams. Most apps fill at a fraction of the size; this one doesn't.

GENERATIVE EXPAND Extend the frame beyond its edges — add sky, foreground, or breathing room with AI that matches your scene.

UPSCALE & RECREATE Boost resolution and detail, or let AI recreate a cleaner version of your shot.

TRUE COLOR — DISPLAY P3 + HDR Unlike editors that flatten everything to sRGB, Keystone preserves your photo's Display P3 wide-gamut color and HDR gain map end to end — so edits stay as vivid as the original on your iPhone's screen.

KEEPS YOUR ORIGINALS INTACT Native HEIC/HEIF in and out, EXIF and location metadata preserved, saved in the same format to conserve space.

Simple, fast, private: • No account required — start editing instantly • Photos processed at full quality • Latest cutting-edge AI models

Download Keystone Photo Studio and make every photo look like it was shot with a tilt-shift lens.

Keystone Photo Studio offers optional auto-renewable subscriptions for additional monthly AI credits. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless turned off at least 24 hours before the end of the current period; manage or cancel anytime in your Apple Account settings.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://vlodkodesign.com/keystone/privacy.html