Duolingo: Language Lessons vs Rock ID - 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
$12M–$41M
$900–$5k
Downloads / mo
7.0M–29M
3k–12k
Rating
★ 4.73 (47M)
★ 4.23 (7k)
Pricing
Free + IAP
Free + IAP
Category
Education
Education
Released
13.2y ago
2.5y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $12M–$41M/mo, versus $900–$5k/mo for Rock ID - Stone Identifier.