A fair comparison

ZoneSteady vs Apple's Workout app

Apple's Workout app is good. ZoneSteady adds coaching and progress tracking.

FeatureApple WorkoutZoneSteady
AvailabilityBuilt inApp Store
PriceFreeFree
Zone coachingShows heart rate zones
Heart rate zone alerts in custom workouts
Zone coaching: full-screen zone color plus pick-it-up / ease-off cues
Training trendsTraining Load and Cardio Fitness trends in the Fitness appTrends built for zone training: Fitness & Form, readiness, running efficiency (distance per heartbeat), Load Focus
Workout featuresSupports custom workouts and alertsHybrid Race: stations, run splits and transitions
iPhone live workout screen
Apple HealthBoth save to Apple HealthBoth save to Apple Health
Download on the App Store