Duolingo: Language Lessons vs TOEFL®テスト英単語3800（4訂版）
A data-backed head-to-head — estimated revenue, downloads, ratings and pricing side by side, from live App Store signals. Updated continuously.
Revenue / mo
$23M–$95M
$6–$30
Downloads / mo
4.1M–17M
1–2
Rating
★ 4.73 (5.2M)
★ 1.00 (1)
Pricing
Free + IAP
Paid $14.99
Category
Education
Education
Released
13.6y ago
10.0y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $23M–$95M/mo, versus $6–$30/mo for TOEFL®テスト英単語3800（4訂版）.