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!

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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

Usage

Here are the basics. See the wiki for more detailed instructions.

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