Duolingo: Language Lessons vs QC検定®3級 秒トレ：忘却曲線で覚える品質管理検定®3級
A data-backed head-to-head — estimated revenue, downloads, ratings and pricing side by side, from live App Store signals. Updated continuously.
Revenue / mo
$12M–$40M
$60–$400
Downloads / mo
6.6M–27M
100–800
Rating
★ 4.73 (48M)
★ 4.56 (—)
Pricing
Free + IAP
Free + IAP
Category
Education
Education
Released
13.2y ago
6mo ago
Verdict: Duolingo: Language Lessons earns more — an estimated $12M–$40M/mo, versus $60–$400/mo for QC検定®3級 秒トレ：忘却曲線で覚える品質管理検定®3級.