A1 PDF編集: PDF変換、リーダー、スキャンアプリ

Why this icon holds up

On 2026-08-12 the vault captured the A1 PDF編集: PDF変換、リーダー、スキャンアプリ icon (Business, US): 红色圆角文件背景，白色PDF文字，下方有白色横线和铅笔图标。

No earlier vault capture exists yet, so this dated page is the baseline for future diffs.

Tagged as illustration · neutral.

Small-size readability

• Contrast: white mark on red fill — check both dim OLED and bright LCD.
• Silhouette budget: file, pencil, lines should remain readable after the store’s rounded-square crop.
• Lettering “PDF” must survive home-screen size; thin strokes usually fail first.
• illustration/light detail collapses quickly below ~60px — verify the 60px mental model before trusting the master.
• Internal usability score for this capture: 0.6/100 (heuristic, not a store ranking).

These checks are practical references for designers reviewing A1 PDF編集: PDF変換、リーダー、スキャンアプリ, not authoritative store scores.

Transferable design moves

• Keep file as the primary silhouette before adding secondary ornaments.
• Concentrate the loudest chroma on the identifying shape (white), not the whole red field.
• This capture’s illustration/light vocabulary transfers best when the same restraint is applied at export size.