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
$3.5M–$12M
$1k–$6k
Downloads / mo
7.0M–29M
3k–13k
Rating
★ 4.73 (49M)
★ 4.20 (7k)
Pricing
Free + IAP
Free + IAP
Category
Education
Education
Released
13.4y ago
2.7y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $3.5M–$12M/mo, versus $1k–$6k/mo for Rock ID - Stone Identifier.