エックス線作業主任者 2026年4月 vs Duolingo: Language Lessons
A data-backed head-to-head — estimated revenue, downloads, ratings and pricing side by side, from live App Store signals. Updated continuously.
Revenue / mo
$3–$60
$12M–$40M
Downloads / mo
3–20
6.6M–27M
Rating
—
★ 4.73 (48M)
Pricing
Paid $2.99
Free + IAP
Category
Education
Education
Released
—
13.2y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $12M–$40M/mo, versus $3–$60/mo for エックス線作業主任者 2026年4月.