Period Tracker and Calendar vs Red Book
A data-backed head-to-head — estimated revenue, downloads, ratings and pricing side by side, from live App Store signals. Updated continuously.
Revenue / mo
$1.5M–$6.2M
$100–$500
Downloads / mo
510k–2.1M
100–700
Rating
★ 4.87 (551k)
★ 4.30 (55)
Pricing
Free + IAP
Free + IAP
Category
Medical
Medical
Released
10.8y ago
4.6y ago
Verdict: Period Tracker and Calendar earns more — an estimated $1.5M–$6.2M/mo, versus $100–$500/mo for Red Book.