Das Zahlenbuch 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
$20–$400
$12M–$40M
Downloads / mo
6–30
6.6M–27M
Rating
—
★ 4.73 (48M)
Pricing
Paid $10.99
Free + IAP
Category
Education
Education
Released
2.5y ago
13.2y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $12M–$40M/mo, versus $20–$400/mo for Das Zahlenbuch.