Requirements Checklist
Make sure you have everything you need before downloading.
iPhone
iOS 18.6 or later
Check your version: Settings → General → About → iOS Version
⌛ Apple Watch
watchOS 11.0 or later
Check your version: Watch app → General → About → Version
🕒 Time & Space
16+ minutes in a quiet environment
A place to lie down and a wall to lean against
🔋 Battery
30%+ Apple Watch charge
The test uses continuous heart rate monitoring
Optional but Recommended
- Blood pressure cuff: For tracking BP changes during the test
- Comfortable clothing: Non-restrictive clothes you can lie down in
Download POTS Check
POTS Check is completely free with no subscriptions or in-app purchases.
App Store ID: 6754960172
Your First Test
Here's what to expect when you open the app.
Choose Your Account Type
Guest Mode for a quick single test, or Secure Account for unlimited test history with encryption. Both are free.
Enter Your Age
Your age determines which POTS threshold applies to your results (40+ bpm for ages 13-19, 30+ bpm for adults 20+).
Grant Permissions
Allow access to Heart Rate (HealthKit) and Motion & Fitness for the test to work. Your data stays on your device.
Start Your Test
Follow the guided NASA Lean Test: 5 minutes lying down, 10 minutes standing against a wall, and optional 1-minute recovery.
Prepare for Your Test
4 Hours Before
- Avoid caffeine, alcohol, and heavy meals
2 Hours Before
- Avoid nicotine/vaping
- Avoid strenuous exercise
Right Before
- Use the restroom
- Have water nearby (but don't drink large amounts right before)
- Wear your Apple Watch snugly
- Find a comfortable spot to lie down with a wall nearby
Safety Reminder
Stop the test immediately if you feel faint, have chest pain, severe dizziness, or any concerning symptoms. Test in a safe environment where you can sit or lie down quickly if needed.
Ready to Start?
Download POTS Check and take your first screening test today.