電気工事士 第2種 2026 全問解説 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
$100–$800
$12M–$40M
Downloads / mo
400–2k
6.6M–27M
Rating
★ 4.55 (—)
★ 4.73 (48M)
Pricing
Free + IAP
Free + IAP
Category
Education
Education
Released
3.4y ago
13.2y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $12M–$40M/mo, versus $100–$800/mo for 電気工事士 第2種 2026 全問解説.