# Sketch Clean — Sketch to Transparent Line Art

> Converts paper sketches to transparent line art for digital art applications. (iPhone/iPad app by Robert Katona.)

- Source: https://appshunter.io/ios/app/sketch-clean/id6760979290 (this page in markdown: same URL + `.md`)
- Developer: [Robert Katona](https://appshunter.io/developer/1879499851)
- Category: Graphics & Design
- Price: $0.99
- Age rating: 4+
- Requires: iOS 15.1 · 26 MB
- Languages: American English
- Released: 2026-03-24
- Data updated: 2026-09-30
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/sketch-clean/id6760979290/reviews.md

## What is Sketch Clean?

Turn notebook sketches into crisp line art on a transparent background — ready for colour, lettering, or finishing in your favourite art app.

No more grey paper texture or smudged pencil fill: Sketch Clean isolates your lines so you can work digitally without redrawing from scratch.

Private by design: processing stays on your device — no upload, no account, no analytics.

HOW IT WORKS

- Photograph your sketch or pick one from your photo library
- Sketch Clean detects the page, corrects perspective, and removes paper tint and shadows
- Your clean line art is ready on a transparent background in seconds

FEATURES

- Transparent PNG export — lines on alpha, ready to layer in Procreate, Clip Studio, Photoshop, or any digital art tool
- "On White" export — share a white-background version that looks great anywhere
- Automatic page detection and perspective correction — no manual cropping needed
- Shadow and tint removal — handles yellowed paper, uneven lighting, and pencil smudge
- Sensitivity slider — keep faint construction lines or capture only bold strokes
- Preserve tones toggle — retain subtle pencil graduation or output pure black lines
- Before/after comparison slider — drag to see the difference
- Share directly to other apps via the iOS share sheet

COMPLETELY OFFLINE

Every step of processing happens on your iPhone or iPad. Your sketches are never uploaded anywhere. No internet connection required.

ONE PRICE, NO SURPRISES

Sketch Clean is a one-time purchase. No subscriptions, no in-app purchases, no ads. Pay once, use forever.

PERFECT FOR

- Traditional artists digitising pencil or ink drawings
- Illustrators preparing line art for digital colouring
- Comic and manga hobbyists cleaning up hand-drawn panels
- Letterers extracting hand-drawn type
- Anyone who sketches on paper and finishes digitally

PRIVACY

Sketch Clean collects no data. No analytics, no tracking, no accounts. Your artwork stays on your device.

## Key features

- Transparent PNG export
- Automatic page detection
- Perspective correction
- Shadow and tint removal
- Sensitivity adjustment
- Offline processing

## Chart rankings

- #49 in Top Paid · Graphics & Design (US App Store)

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/sketch-clean/id6760979290/reviews.md

### 1/5 — Waste of $$

*2026-08-04*

It doesn’t clean up the lines just turns the image into an svg.

## Frequently asked questions about Sketch Clean

### What is Sketch Clean?

Sketch Clean is a mobile application designed to convert your physical sketches into clean, transparent line art. It automatically corrects perspective and removes paper imperfections, preparing your artwork for digital finishing.

### How does Sketch Clean work?

You can photograph your sketch or select one from your library. Sketch Clean then detects the page, corrects perspective, and removes paper tint and shadows, outputting clean line art on a transparent background.

### What file formats can I export from Sketch Clean?

You can export your cleaned line art as a transparent PNG file, which is ideal for layering in digital art software. An "On White" export option is also available for sharing on a white background.

### Does Sketch Clean require an internet connection?

No, Sketch Clean is completely offline. All processing happens directly on your iPhone or iPad, ensuring your sketches are never uploaded and no internet connection is required.

### What is the pricing for Sketch Clean?

Sketch Clean is available as a one-time purchase for $0.99. There are no subscriptions, in-app purchases, or advertisements, meaning you pay once and can use it forever.

### Is Sketch Clean suitable for children?

Sketch Clean has an age rating of 4+, making it suitable for younger users. The app's functionality is straightforward and focused on image processing.

### How often is Sketch Clean updated?

The latest version of Sketch Clean is 1.0, and it was last updated on March 24, 2026. Future updates will likely focus on refining features and ensuring compatibility with new iOS versions.

### Does Sketch Clean collect any user data?

No, Sketch Clean is designed with privacy in mind and collects no data. There are no analytics, tracking, or accounts required, ensuring your artwork remains private on your device.

## Version history (last 1 release)

### 1.0 — 2026-03-24

No release notes.

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## More apps by Robert Katona

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- [Nearness App](https://appshunter.io/ios/app/nearness-app/id6760011781)
- [TenantPad — Maintenance](https://appshunter.io/ios/app/tenantpad-maintenance/id6760184545)
- [TenantPad — Inspection](https://appshunter.io/ios/app/tenantpad-inspection/id6760295126)

All apps by Robert Katona: https://appshunter.io/developer/1879499851

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*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 2026-09-30.*