Stacklight: Focus Stacking

Stacklight is a photo stacker for pictures you already took. It lines up several photos of the same scene and combines them into one better picture, at full resolution, on your phone: focus stacking for macro and product shots, star trails and light trails, noise reduction, removing people from busy places, and smooth water. All features are free. No account, works offline. WHAT IT DOES - Focus stacking: one picture sharp from front to back, from photos focused at different distances. A sharpness map picks the sharpest frame for each spot and a pyramid blend joins them without seams. A depth map shows which frame each spot came from. - Star trails (lighten composite): tripod night frames become one picture of the stars turning. Gap filling measures how the sky turned between shots and joins each star's dashes; lights that don't move stay as they are. Optional comet tails. - Light trails and fireworks: the bright parts of every frame, kept together. - Less noise (mean): average a burst for cleaner low-light photos, even handheld. - Remove people (median): whatever moves between shots disappears. - Smooth water (mean): many short shots, or frames from a video, look like a long exposure. BEFORE IT STACKS - Alignment corrects shifts, small turns and zoom between handheld shots, focus breathing included. Check it first: each frame gets a quality mark, and an overlay shows any ghosting. Frames that can't be lined up are left out, never blended in. - A time and storage estimate before the run, a progress bar and cancel during it. THE RESULT - Full resolution, no 5 MP cap. JPEG with the first photo's camera details (EXIF), or PNG. - Compare with the first or last frame using a slider, pinch to zoom. - Save to your gallery (album Stacklight) or share. - No AI that invents detail: every pixel comes from your own frames. WHO IT IS FOR Macro and product photographers, astrophotography and night-sky beginners, travellers who want a landmark without the crowd, and anyone with a tripod and a phone or camera. GUIDE How to shoot each kind of stack, and a star-trail planner: shots needed, trail length and the time lost to gaps. LIMITS, HONESTLY - Tested on synthetic image sets with known answers (focus slices, star fields, noise, crowds), not yet on real macro or night photos: look closely at your result before deleting the originals. - Things that move between frames can leave ghosts or soft spots. Aligned stacks are cropped to the area every frame shows. - Reads JPEG, PNG, WebP and HEIC from the gallery, not RAW files. Large stacks take minutes and the app must stay open while it works. Languages: English, Japanese, Spanish, German, French, Portuguese (Brazil). Your photos are processed on the phone. Nothing is uploaded. Privacy policy: https://fernhartlabs.com/privacy