CDL Prep Practice Test: 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
$3k–$13k
$5.1M–$21M
Downloads / mo
3k–13k
3.4M–14M
Rating
★ 4.64 (3k)
★ 4.73 (5.3M)
Pricing
Free + IAP
Free + IAP
Category
Education
Education
Released
3.2y ago
13.6y ago
Verdict: Duolingo: Language Lessons earns more — an estimated $5.1M–$21M/mo, versus $3k–$13k/mo for CDL Prep Practice Test: 2026.