Flattr vs Sharp

Merge multiple exposures into one perfectly balanced photo — real GPU exposure fusion. Free, no subscription required. Flattr is built for photographers who use exposure bracketing and want clean, natural results. Stack shots, overlay frames, combine exposures — export TIFF or JPEG. No account, no hidden fees. — WHY FLATTR — Most photo apps fake results with tone-curve filters. Flattr does real exposure fusion: it computes weight maps per pixel across contrast, saturation, and edge detail, then blends your exposures through a Laplacian pyramid. The result looks like your eyes saw the scene — not like a preset applied in batch. • Real exposure merge — not a filter • Supports RAW (.DNG) and JPEG inputs • TIFF export • GPU-accelerated — fast even on large files • Auto image alignment via Vision framework • No account, no subscription, no hidden fees — WHAT YOU CAN DO — Photo Merge & Photo Stacking: combine two or more exposures from any exposure bracketing sequence into one seamless image. Flattr aligns your shots automatically before blending, so handheld bracketing works too. Stack three, four, or five photos and get a single frame where every zone is properly exposed — highlights controlled, shadows open. Exposure Blending: weight each pixel by how well-exposed it is. The classic exposure stacking result — without Photoshop, without a desktop. Combine photos straight from your camera roll or imported DNG files. Double Exposure: overlay two photos for artistic compositions. Superimpose a portrait over a landscape, blend a city skyline into a forest, or combine photos into something entirely new. Blend modes give you full control over how the images interact. Overlay & Superimpose: layer photos on top of each other with precise control. Great for creative composites, architectural photography, and experimental work. Superimpose any two images and export at full resolution. Exposure Fusion: balanced light from bracketed shots, without an over-saturated look. Flat, natural, and true to the scene. This is what your eyes see when standing in a bright landscape — Flattr captures it the way your camera can't do alone. — HOW IT WORKS — 1. Select your bracketed exposures from your photo library or import DNG/RAW files directly 2. Reorder if needed — drag to set the blend sequence 3. Tap Merge — Flattr aligns, weights, and fuses in seconds 4. Export as TIFF (full RAW workflow) or high-quality JPEG — WHO IT'S FOR — Landscape and travel photographers who use exposure bracketing to handle tricky light. Architectural photographers dealing with bright windows and dark interiors. Night photographers blending a sharp foreground with a sky. Street photographers layering multiple frames for creative effect. Anyone who wants to combine photos, superimpose images, or fuse exposures and keep every detail. — EXPORT — RAW workflow: exports full-quality TIFF. Compatible with Lightroom, Darkroom, and any TIFF-capable raw editor. JPEG workflow: exports high-quality JPEG optimised for sharing and social. — TECHNICAL — Built on Metal GPU processing and Apple's Vision framework for image alignment. Laplacian pyramid blending preserves fine texture and edge detail that simple opacity-based layer blending destroys. Works on iPhone and iPad. Supports DNG, RAW, and JPEG inputs. Flattr. Real photo blending, made simple. Download free and merge your first bracket in under a minute.

Shoot the same thing more than once, and Sharp puts the shots together. Six tools, one engine. Nothing here edits a single photograph — everything here takes many frames of the same scene and gives back one picture. FOCUS — sharp from front to back A lens holds one plane in focus, and close up that plane is thinner than the subject. Move the focus between frames and Sharp takes every part of the result from the frame that has it sharpest. Not sure how wide its detail size should be? Choose by Eye stacks a piece of your bracket at four widths, side by side, so you can see which one has no halo. CLEAN — less noise, and long-exposure water Noise is different in every frame and the subject is not, so averaging frames takes it down by the square root of how many you shot: four halve it, sixteen quarter it. Water and cloud move between frames and average into smoothness, while everything that held still stays sharp. VANISH — the people walk out of the picture Take a dozen frames a few seconds apart while the square empties and fills. At each pixel Sharp keeps the frames that agree and throws out the ones that do not, then averages what is left — whoever was walking through is gone, and the noise goes with them. TRAILS — every place the light went A hundred short exposures of a night sky, a torch drawing, headlights on a bend. Sharp keeps the brightest frame at each pixel, so every mark the light made is in the picture and the sky stays as dark as one frame had it. Or keep the darkest instead, and take the passing lights out. BLEND — the shadows and the highlights both An exposure bracket, darker and brighter, into one picture: the sky from the dark frame, the shadows from the bright one, blended without a seam and with no curve to set. PICK — the sharpest frame of the burst Twenty handheld frames, one of them caught between heartbeats. Sharp hands back the one that won, exactly as it came off the camera. BUILT FOR LARGE SETS • Camera RAW, HEIC, JPEG, TIFF and PNG, read straight from Files or Photos • Frames are read a strip at a time, so memory does not grow with the number of frames • Alignment that covers focus breathing, drift and a rolled wrist, and checks its own work • Compare the result with any single frame at exactly the same zoom, beside a map of how each pixel was decided PAINT IT BACK Every one of these tools is a guess made a pixel at a time. Choose the frame that has that part right and paint it back over the result — one finger paints, two move the picture, an Apple Pencil presses harder for more. The repair is re-applied to the 16-bit file at full depth. FREE, AND THEN ONE PAYMENT All six tools run on up to 12 frames free, at full quality: the same alignment, the same merges, the same speed, the same RAW support, and a full-resolution JPEG with no watermark. Nothing about how good the picture is has been held back. The $9.99 unlock adds: • Unlimited frames, for every tool • The retouch brush, with retouches you can reopen and change • 16-bit TIFF, the maps, and every frame aligned for Helicon, Zerene or Photoshop • Every bracket kept as a project, with its settings and its result • Batches of projects run one after another, and long brackets stacked in slabs One payment, shared with your family. No subscription, no account, and not a timed trial. NOTHING LEAVES YOUR DEVICE No analytics, no tracking, no server, and no network of its own. Your photographs are read where they are, and the only thing that goes anywhere is what you share yourself.