Swim Check 🏊

A mobile-first single-page app for tracking swim times against Oregon Swimming (OSI) motivational time standards.

Not in Oregon and want to see your state's motivational data? Start a discussion or drop me a line and let's talk!

Do you find this app useful?

Please consider helping me cover my kid's swim meet fees!

Data Source

Time standards are sourced from the Oregon Swimming Time Standards, which are typically updated 1-2 times per year.

Current standards: 2025-2026 OSI Time Standards A/B+/B

Data Inconsistencies ⚠️

The following issues were observed in the source data from the OSI site*, and are highlighted in the app:

Age/Gender	Event	Course	Standard	Value	Issue
Girls 11	1500 Free	LCM	B	24:38.39⚠️	B should be 24:18.39 (A × 1.1, rounded to 1 decimal + 0.09)
Girls 12	1500 Free	LCM	B	24:38.39⚠️	B should be 24:18.39 (A × 1.1, rounded to 1 decimal + 0.09)
Girls 13	1500 Free	LCM	B	24:38.39⚠️	B should be 24:18.39 (A × 1.1, rounded to 1 decimal + 0.09)
Boys 14	200 Free	SCY	B+	2:05.49⚠️	B+ should be 2:11.79 ((A + B) / 2, rounded to 1 decimal + 0.09)
Boys 15 & Over*	1500 Free	SCM	B	21:59.09⚠️	B should be 21:58.99 (A × 1.1, rounded to 1 decimal + 0.09)

Issue Key

• Invalid format: The time does not match the pattern MM:SS.MS or SS.MS, or exceed 60-second increment notation (e.g. 96.99 seconds).
• Invalid progression: The time does not fit in the expected "faster to slower" time progression calculation for standards: A < B+ < B.

🪲 Encounter any other issues? Head over to the Issues tab and let me know!

* Note that the OSI PDF may contain errors, and so can this app! Refer directly to OSI for questions/corrections related to time standards.

Features

• Mobile-First Design: Optimized for use at swim meets on mobile devices
• Time Comparison: Compare swimmer times against A, B+, and B motivational standards
• Visual Feedback: Color-coded qualification levels for easy tracking
• Persistent Storage: All times and settings saved locally between sessions
• Multi-Day Support: Track times across multi-day swim meets
• Course Support: SCY (Short Course Yards), SCM (Short Course Meters), LCM (Long Course Meters)

Usage

1. Select your Age Group from the dropdown
2. Choose Gender (Girls/Boys)
3. Select Course Type (SCY/SCM/LCM)
4. Enter your swim times in the "Your Time" column
   • Format: MM:SS.MS for times over 1 minute (e.g., 1:28.19)
   • Format: SS.MS for times under 1 minute (e.g., 28.45)
5. Times are automatically evaluated and color-coded:
   • Green: A time qualified
   • Blue: B+ time qualified
   • Yellow: B time qualified
   • Gray: Did not qualify

All entered data is automatically saved to your browser's local storage.

Development

Built with:

• Vanilla JavaScript (no framework dependencies)
• Pico CSS for styling
• Local Storage API for data persistence

Deployment

The app is automatically deployed to GitHub Pages on push to the main branch via GitHub Actions.

License

MIT