Duolingo: Language Lessons vs Star Walk 2 Pro：Night Sky View
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–$40M
$2k–$28k
Downloads / mo
6.6M–27M
2k–7k
Rating
★ 4.73 (48M)
★ 4.64 (32k)
Pricing
Free + IAP
Paid $2.99
Category
Education
Education
Released
13.2y ago
11.4y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $12M–$40M/mo, versus $2k–$28k/mo for Star Walk 2 Pro：Night Sky View.