# Koutuxia: Background Remover — One-tap cutout, all on-device

> One-tap cutout, all on-device (iPhone/iPad app by 正平 孙.)

- Source: https://appshunter.io/ios/app/koutuxia-background-remover/id6792638557 (this page in markdown: same URL + `.md`)
- Developer: [正平 孙](https://appshunter.io/developer/6781502079)
- Category: Photo & Video, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 5 MB
- Languages: English, Chinese
- Released: 2026-08-06
- Data updated: 2026-09-09
- User reviews in markdown: https://appshunter.io/ios/app/koutuxia-background-remover/id6792638557/reviews.md

## What is Koutuxia?

Koutuxia is an on-device background remover and product-photo editor for iPhone and iPad. Choose a photo, separate its subjects, then adjust the background, canvas, composition, edges, and shadow. No account or upload is required, and it works in Airplane Mode.

Remove backgrounds
· Choose from Photos, import from Files, or paste from the clipboard
· Send an image straight from the Photos or Files share sheet
· Detect people, pets, products, and everyday objects
· Keep one, several, or all detected subjects
· Export a transparent background for further design work

Edge cleanup
· Smart mode removes colour fringes and keeps soft hair detail
· Full-resolution export aligns the mask with real edges in the original photo
· Hair & Fur preserves the mask exactly as detected
· Product Edge applies stronger cleanup to common background fringes
· Inspect edges full screen with pinch-to-zoom

Fix background
· When detection misses the subject or leaves background behind, tap the area to clear it
· Tap two separated same-colour areas to clear that colour everywhere
· Brush anything back later with the refine editor

Refine precisely
· A live magnifier follows the brush
· A coloured mask overlay helps with erasing and restoring
· Pinch to zoom and drag the canvas
· Strokes are final; restore automatic edges at any time
· Undo, redo, or reset changes

Product images
· Apply a white background, square canvas, composition, edge treatment, and shadow in one tap
· Original size or 800×800, 1000×1000, 1200×1200, and 1600×1600 squares
· Adjust subject size, placement, background colour, and shadow

Batch processing
· Select up to nine photos
· Apply one background, size, format, placement, and shadow to the batch
· Stop and resume any time, retry only failed items
· Share every finished image at once

More tools
· Stitch Screenshots reduces repeated fixed headers and footers
· Film Negative restores colour or black-and-white negatives with manual colour controls

Save and share
· Original-size export keeps the photo's full native pixels
· PNG preserves transparency
· JPG fills an effective background
· Save to Photos or use the system share sheet

Privacy
Koutuxia has no account, ads, cloud upload, or data collection. Apple frameworks process every image on your device.


## Version history (last 5 releases)

### 1.14 — 2026-08-30

· Added Shortcuts plus Siri and Spotlight entry points for starting cutout workflows from system automation
· When no subject is detected, tap the background to continue the cutout
· Added 4:5 and 9:16 canvases for product and social images
· Added Restore Subject to bring back connected areas removed by automatic cutout
· Added one-tap content packs that create 1:1, 4:5, and 9:16 results with the current settings
· Improved export cancellation, temporary-file cleanup, and stability under load

### 1.9 — 2026-08-24

· New Fix Background: when detection misses the subject or leaves background behind, tap the leftover area to clear it; tapping two separated same-colour areas clears that colour everywhere
· Full-resolution Smart Edges follow details in the original photo for closer hair, fur, and outline alignment
· Manual erase and restore strokes are final, so saving and sharing never trim them again
· Restore Automatic Edges discards manual changes and re-enables the edge modes
· Leaving the image no longer connects a stroke across the subject
· Fixed re-picking the same photo right after an import error
· Stopping a batch now takes effect immediately and reports the stopped state correctly

### 1.7 — 2026-08-23

· Send an image to Koutuxia straight from the Photos or Files share sheet
· Paste a copied image from the home screen
· Original-size export keeps the photo's full native pixels
· Smart edge cleanup removes colour fringes and leaves hair detail alone
· Stop and resume batch runs, remove photos before starting, and share every finished image at once

### 1.6 — 2026-08-22

· Choose one or more subjects in photos with multiple people or objects, or keep them all
· Smart edge cleanup now adapts to the amount of soft detail in the cutout mask
· Clearer Smart, Hair & Fur, and Product Edge choices replace technical edge controls
· The refine editor adds a live magnifier and coloured mask overlay for more accurate brushing
· A warning prevents accidental loss of manual refinements when changing subjects

### 1.5 — 2026-08-21

· A new Smart Product preset sets a white background, square canvas, composition, edge treatment, and shadow in one tap
· New natural, tighter, and softer edge treatments, auto composition, and full-screen edge inspection
· Stitch Screenshots detects fixed top and bottom bars, avoids repeated content, and clearly identifies shots that do not connect
· Film Negative removes the orange base before inversion, with exposure, warmth, tint, contrast, and manual film-base controls
· Retry failed batch items individually, and try the new permission-free sample with a draggable before-and-after comparison
· Fixed hold-to-view-original ending too soon, and reduced common background-colored edge fringes by default

## More apps by 正平 孙

- [IPok: IP Risk & Leak Check](https://appshunter.io/ios/app/ipok-ip-risk-and-leak-check/id6781751697)
- [MoGuan PDF – Offline & Private](https://appshunter.io/ios/app/moguan-pdf-offline-and-private/id6789107643)
- [CapScribe: Auto Captions](https://appshunter.io/ios/app/capscribe-auto-captions/id6801041856)
- [SizeCap: Compress Video to MB](https://appshunter.io/ios/app/sizecap-compress-video-to-mb/id6801584724)
- [ClearTake: Audio Denoise](https://appshunter.io/ios/app/cleartake-audio-denoise/id6802951150)

All apps by 正平 孙: https://appshunter.io/developer/6781502079

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-09.*