12-Lead ECG Challenge vs Period Tracker and Calendar
A data-backed head-to-head — estimated revenue, downloads, ratings and pricing side by side, from live App Store signals. Updated continuously.
Revenue / mo
$8k–$34k
$220k–$890k
Downloads / mo
2k–8k
73k–300k
Rating
★ 2.57 (66)
★ 4.87 (551k)
Pricing
Paid $5.99
Free + IAP
Category
Medical
Medical
Released
14.8y ago
10.8y ago
Verdict: Period Tracker and Calendar earns more — an estimated $220k–$890k/mo, versus $8k–$34k/mo for 12-Lead ECG Challenge.