CASIO Graph Calculator Manual vs Duolingo: Language Lessons
A data-backed head-to-head — estimated revenue, downloads, ratings and pricing side by side, from live App Store signals. Updated continuously.
Revenue / mo
$6–$90
$3.2M–$11M
Downloads / mo
3–20
2.7M–12M
Rating
★ 2.83 (6)
★ 4.72 (5.5M)
Pricing
Paid $4.99
Free + IAP
Category
Education
Education
Released
12.4y ago
13.9y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $3.2M–$11M/mo, versus $6–$90/mo for CASIO Graph Calculator Manual.