极简线稿 app for iPhone and iPad

Here is the translation:

- No need for internet, clean and ad-free.
- 【One-click Outline Extraction】
Supports converting images of various styles into clear outlines, which can be directly used for coloring.
- 【Transparent Background】
Supports saving with pure white or transparent background.
- 【Line Thickness Adjustment】
Drag to adjust the thickness of the lines, with real-time preview.
- 【Line Detection Threshold】
Drag to adjust the line detection effect, with real-time preview.
- 【Compare with Original】
Press your finger to compare with the original image.

Outlines can be used for coloring, imitation, and more.