Transform Your Swimming Data Into Performance
Scientific metrics, personalized training zones, and comprehensive performance tracking. All processed locally on your iPhone with complete privacy.
✓ 7-day free trial ✓ No account required ✓ 100% local data
Everything You Need to Improve
Professional-grade analytics designed for swimmers at every level
Scientific Metrics
Critical Swim Speed (CSS) determines your aerobic threshold, enabling Training Stress Score (TSS) calculation and CTL/ATL/TSB performance tracking based on proven sports science research.
Training Zones
7 personalized training zones calibrated to your CSS. Optimize every workout for recovery, aerobic, threshold, or VO₂max development.
Smart Comparisons
Weekly, monthly, and yearly period comparisons with automatic trend detection and percentage changes for all metrics.
Complete Privacy
All data processed locally on your device. No servers, no cloud, no tracking. You own and control your swimming data.
Export Anywhere
Export workouts and analytics in JSON, CSV, HTML, or PDF formats. Compatible with coaches, spreadsheets, and training platforms.
Instant Performance
Sub-0.35s app launch with local-first architecture. View your workouts instantly without waiting for syncs or downloads.
See SwimAnalytics in Action
Beautiful, intuitive interface designed for swimmers
Workouts Overview
Lap-by-Lap Analysis
Advanced Metrics
Performance Trends
Training Zones
Export Options
Professional Metrics That Matter
SwimAnalytics transforms raw swimming data into actionable intelligence using metrics validated by sports science research
CSS
Critical Swim Speed - your aerobic threshold pace
TSS
Training Stress Score quantifies workout intensity
CTL
Chronic Training Load - 42-day rolling average
ATL
Acute Training Load - 7-day rolling average
TSB
Training Stress Balance indicates readiness
SWOLF
Stroke efficiency score - lower is better
7 Zones
Recovery to Sprint intensity levels
PRs
Automatic personal record tracking
Simple, Transparent Pricing
Start with a 7-day free trial. Cancel anytime.
Monthly
7-day free trial
- Unlimited workout sync
- All scientific metrics (CSS, TSS, CTL/ATL/TSB)
- 7 personalized training zones
- Weekly, monthly & yearly comparisons
- Export in JSON, CSV, HTML & PDF
- 100% privacy, local data
- All future updates
Annual
Save €8.88/year (18% off)
- Unlimited workout sync
- All scientific metrics (CSS, TSS, CTL/ATL/TSB)
- 7 personalized training zones
- Weekly, monthly & yearly comparisons
- Export in JSON, CSV, HTML & PDF
- 100% privacy, local data
- All future updates
- Only €3.25/month
Built for Serious Swimmers
Professional features without the complexity
CSS Test Protocol
Built-in 400m + 200m test protocol to determine your Critical Swim Speed. Repeat every 6-8 weeks to track progress and adjust training zones automatically.
Native iOS Experience
Built with SwiftUI for smooth performance and iOS integration. Seamless Health app sync, widgets support, and familiar Apple design language.
Research-Based
All metrics based on peer-reviewed sports science research. CSS from Wakayoshi et al., TSS adapted for swimming with IF³ formula, proven CTL/ATL models.
Coach-Friendly
Export detailed reports for coaches. Share HTML summaries via email, CSV for spreadsheet analysis, or PDF for training logs and records.
Works Everywhere
Pool or open water, sprints or distance. SwimAnalytics adapts to all swimming types and automatically detects workout characteristics.
Always Improving
Regular updates with new features based on user feedback. Recent additions include yearly comparisons, personal records tracking, and enhanced export options.
Frequently Asked Questions
How does SwimAnalytics get my swimming data?
SwimAnalytics syncs with Apple Health to import swimming workouts recorded by any compatible device or app. This includes smart watches, fitness trackers, and manual entries. The app processes this data locally to calculate advanced metrics.
What is the CSS test and how do I perform it?
CSS (Critical Swim Speed) is a scientific protocol using 2 maximum effort swims: 400m and 200m with 10-20 minutes rest between. The app calculates your aerobic threshold from these times and automatically adjusts all training zones. Repeat every 6-8 weeks to track progress.
Is my data uploaded to the cloud?
No. SwimAnalytics processes all data locally on your iPhone. There are no external servers, no cloud accounts, no data transfers. You control exports: generate JSON, CSV, HTML, or PDF files and share them however you want.
Can I use SwimAnalytics for open water swimming?
Yes. SwimAnalytics works with any swimming workout in Apple Health, including open water. The app adapts to available metrics whether you're in a pool or open water, providing relevant analysis for each environment.
What's the difference between monthly and annual plans?
Both plans offer identical features: all metrics, unlimited zones, temporal comparisons, multiple exports, and free updates. The only difference is price: annual saves 18% (equivalent to €3.25/month vs €3.99/month).
Can I cancel my subscription anytime?
Yes. Subscriptions are managed through the App Store, so you can cancel anytime from Settings → [Your Name] → Subscriptions. If you cancel, you'll maintain access until the end of your current billing period.
Ready to Transform Your Swimming?
Join thousands of swimmers using scientific metrics to improve performance. Start your 7-day free trial today.
Learn More About Swimming Analytics
Dive deeper into the science behind SwimAnalytics
Critical Swim Speed
Understand how CSS determines your aerobic threshold and why it's crucial for structured training.
Learn about CSS →Training Load Management
Discover how TSS, CTL, ATL, and TSB help you balance training stress and recovery.
Explore Training Load →Training Zones
Learn about the 7 training zones and how to use them for targeted workout planning.
View Training Zones →