ADI Theory & Hazards Kit 2026 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
$7–$200
$12M–$40M
Downloads / mo
3–10
6.6M–27M
Rating
★ 4.17 (—)
★ 4.73 (48M)
Pricing
Paid $7.99
Free + IAP
Category
Education
Education
Released
9.3y ago
13.2y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $12M–$40M/mo, versus $7–$200/mo for ADI Theory & Hazards Kit 2026.