Duolingo: Language Lessons vs Rock Finder: Stone Identifier
A data-backed head-to-head — estimated revenue, downloads, ratings and pricing side by side, from live App Store signals. Updated continuously.
Revenue / mo
$9.6M–$32M
$1k–$7k
Downloads / mo
2.5M–11M
2k–8k
Rating
★ 4.72 (5.4M)
★ 4.57 (421)
Pricing
Free + IAP
Free + IAP
Category
Education
Education
Released
13.7y ago
1.1y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $9.6M–$32M/mo, versus $1k–$7k/mo for Rock Finder: Stone Identifier.