両替電卓｜為替 レート 通貨換算 ドル円

Why this icon holds up

On 2026-08-12 the vault captured the 両替電卓｜為替 レート 通貨換算 ドル円 icon (Travel, JP): 黑色背景的计算器图标，包含白色显示屏、货币符号按钮和橙色箭头按钮。

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

Tagged as photographic · serious.

Small-size readability

• Contrast: gray mark on black fill — check both dim OLED and bright LCD.
• Silhouette budget: calculator, buttons, arrow, dollar sign, euro sign, yen sign, pound sign, display should remain readable after the store’s rounded-square crop.
• Lettering “00 $ € ¥ £ →” must survive home-screen size; thin strokes usually fail first.
• detailed/photo detail collapses quickly below ~60px — verify the 60px mental model before trusting the master.
• Internal usability score for this capture: 0.2/100 (heuristic, not a store ranking).

These checks are practical references for designers reviewing 両替電卓｜為替 レート 通貨換算 ドル円, not authoritative store scores.

Transferable design moves

• Keep calculator, buttons, arrow, dollar sign, euro sign, yen sign, pound sign, display as the primary silhouette before adding secondary ornaments.
• Concentrate the loudest chroma on the identifying shape (gray), not the whole black field.
• This capture’s detailed/photo vocabulary transfers best when the same restraint is applied at export size.