Kardia 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
$0
$30k–$170k
Downloads / mo
16k–67k
110k–470k
Rating
★ 4.71 (64k)
★ 4.87 (558k)
Pricing
Free
Free + IAP
Category
Medical
Medical
Released
13.0y ago
11.1y ago