自主保全士 2級 学科問題集 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
$30–$200
$24M–$97M
Downloads / mo
10–70
3.5M–15M
Rating
★ 4.07 (—)
★ 4.72 (46M)
Pricing
Paid $3.49
Free + IAP
Category
Education
Education
Released
2.7y ago
13.1y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $24M–$97M/mo, versus $30–$200/mo for 自主保全士 2級 学科問題集.