Period Calendar Period Tracker vs Plank Challenge: Core Workout

A data-backed head-to-head — estimated revenue, downloads, ratings and pricing side by side, from live App Store signals. Updated continuously.

Period Calendar Period TrackerPlank Challenge: Core Workout

Verdict: Period Calendar Period Tracker earns more — an estimated $1.0M–$5.4M/mo, versus $180k–$980k/mo for Plank Challenge: Core Workout.