Challenge English中高アプリ 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
$0
$9.6M–$32M
Downloads / mo
1–2
2.5M–11M
Rating
★ 5.00 (1)
★ 4.72 (5.4M)
Pricing
Free
Free + IAP
Category
Education
Education
Released
7.4y ago
13.7y ago