ECG Challenge vs Microphone Amplifier
A data-backed head-to-head — estimated revenue, downloads, ratings and pricing side by side, from live App Store signals. Updated continuously.
Revenue / mo
$9–$200
$79k–$430k
Downloads / mo
4–20
300k–1.3M
Rating
★ 4.00 (8)
★ 4.29 (70k)
Pricing
Paid $5.99
Free + IAP
Category
Medical
Medical
Released
14.2y ago
7.1y ago
Verdict: Microphone Amplifier earns more — an estimated $79k–$430k/mo, versus $9–$200/mo for ECG Challenge.