以观书法 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
$100–$1k
$9.6M–$32M
Downloads / mo
200–1k
2.5M–11M
Rating
★ 4.79 (353)
★ 4.72 (5.4M)
Pricing
Free + IAP
Free + IAP
Category
Education
Education
Released
8.0y ago
13.7y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $9.6M–$32M/mo, versus $100–$1k/mo for 以观书法.