한국사 오답노트(한능검 심화 문제&해설) 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
$2–$10
$9.6M–$32M
Downloads / mo
3–20
2.5M–11M
Rating
★ 4.80 (5)
★ 4.72 (5.4M)
Pricing
Free + IAP
Free + IAP
Category
Education
Education
Released
5.7y ago
13.7y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $9.6M–$32M/mo, versus $2–$10/mo for 한국사 오답노트(한능검 심화 문제&해설).