Duolingo: Language Lessons vs Rudi Rainbow – Children's Book
A data-backed head-to-head — estimated revenue, downloads, ratings and pricing side by side, from live App Store signals. Updated continuously.
Revenue / mo
$23M–$95M
$200–$900
Downloads / mo
2.6M–11M
70–300
Rating
★ 4.73 (5.2M)
★ 4.45 (137)
Pricing
Free + IAP
Paid $3.99
Category
Education
Education
Released
13.6y ago
9.0y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $23M–$95M/mo, versus $200–$900/mo for Rudi Rainbow – Children's Book.