CDL Prep Test 2026 Exam 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
$30–$200
$4.4M–$18M
Downloads / mo
100–700
2.9M–12M
Rating
★ 4.82 (990)
★ 4.73 (5.3M)
Pricing
Free + IAP
Free + IAP
Category
Education
Education
Released
3.4y ago
13.6y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $4.4M–$18M/mo, versus $30–$200/mo for CDL Prep Test 2026 Exam.