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
$8.5M–$28M
$2k–$9k
Downloads / mo
2.4M–10M
2k–10k
Rating
★ 4.73 (5.3M)
★ 4.39 (3k)
Pricing
Free + IAP
Free + IAP
Category
Education
Education
Released
13.7y ago
2.6y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $8.5M–$28M/mo, versus $2k–$9k/mo for Rock ID - Stone Identifier.