Apple Watch App of the Year Finalist
Track Every Stroke.
Perfect Every Lap.
The most precise swimming tracker for Apple Watch. Seamlessly sync your iPhone and Apple Watch for professional-grade performance analysis.
50K+
Active Swimmers
4.9★
App Store Rating
2M+
Laps Tracked
95%
Accuracy Rate
Real-time Sync
Medical-Grade Precision
Every feature designed for accuracy, reliability, and seamless Apple ecosystem integration.
Precision Tracking
99.9% Accuracy
Millimeter-accurate stroke detection and lap counting using advanced Apple Watch sensors.
Real-time Sync
<100ms Latency
Instant data synchronization between your iPhone and Apple Watch during swimming.
Performance Analytics
15+ Metrics
Comprehensive stroke analysis, pace tracking, and improvement recommendations.
Health Integration
Full HealthKit
Seamless connection with Apple Health for complete fitness ecosystem integration.
4.9 out of 5
“The most accurate swimming tracker I've ever used. The Apple Watch integration is flawless, and the data sync is instantaneous. Essential for serious swimmers.”
MW
Michael Waters
Olympic Swimming Coach
Ready to Perfect Your Swimming?
Join thousands of swimmers who trust Swimio for precision tracking and performance insights.
Compatible with iOS 18+ and watchOS 11+