Hi! I see you mentioned “Won’t work” about the Kardia app, and that you’re looking for troubleshooting steps. Let’s get to the bottom of this together.

To start, could you tell me a bit more about what exactly isn’t working? For example:
- Is the Kardia app not launching, not connecting to your Kardia device, or not recording ECG data?
- Are you seeing any error messages or lights on your KardiaMobile device?
- Have you already tried any steps like restarting your iPhone or the Kardia device?

Meanwhile, here are some general troubleshooting steps for the Kardia app and KardiaMobile device on your iPhone with iOS 18.7:

1. Confirm the app is up to date. Go to the App Store and check for updates for the Kardia app; having the latest version ensures better compatibility.

2. Check the KardiaMobile device battery. If your device is more than 9 months old, the battery might be low or dead. Replace the coin cell battery if needed.

3. Restart your iPhone and KardiaMobile device. Sometimes a simple reboot of both devices clears temporary glitches.

4. Make sure Bluetooth is enabled on your iPhone. The app relies on Bluetooth to communicate with the KardiaMobile.

5. Check app permissions. Go to iPhone Settings > Kardia app, and ensure Bluetooth access is allowed.

6. Try reconnecting the device. In the app, remove the device and pair it again to refresh the connection.

7. Record ECG while seated and resting. A stable posture helps avoid interference and got cleaner signal.

If you’ve tried all these and the problem persists, please let me know exactly which steps you have done and what behavior you’re seeing. That way I can help you dive deeper into solving it.

Are you comfortable starting with these steps? Or do you want guidance on any specific part first?

Not connecting to my device

Thanks for letting me know that the Kardia app specifically isn’t connecting to your KardiaMobile device. Let’s focus on that connection issue together.

Here’s a step-by-step approach to try:

1. Confirm Bluetooth is On and Permissions are Enabled
Go to your iPhone Settings > Bluetooth and make sure Bluetooth is turned on. Then scroll down in Settings to the Kardia app and check that Bluetooth permission is enabled. The app needs this to connect properly.

2. Make sure the KardiaMobile device has a fresh battery
If your device is older, the coin cell (button) battery might be low. A weak battery can prevent Bluetooth signals. Try replacing the battery if it’s been a while or already dead.

3. Restart both your iPhone and the KardiaMobile device
Power down your iPhone and then turn it back on. For the KardiaMobile, remove and reinsert the battery if you can, or press the power button off and on again (depending on your model). This resets connections.

4. Close and reopen the Kardia app
Fully close the Kardia app by swiping it away in the app switcher, then launch it again. Sometimes the app needs a fresh start.

5. Avoid signal interference
Move away from other electronic devices like Wi-Fi routers or microwaves that might disrupt Bluetooth. Then try pairing or connecting again.

6. Re-pair the device within the app
If the device shows up as connected in your Bluetooth settings but the Kardia app doesn’t recognize it, try removing/unpairing from Bluetooth settings and pairing again only through the Kardia app.

If you still get no connection after trying these, the issue might be with the device hardware or a glitch needing deeper support. Here’s a help article from AliveCor that covers similar no-connection issues with detailed steps, including battery checks and app updates:
No Signal or Weak Signal with my KardiaMobile

And for a quick summary on best practices to fix device connection:
Why won't KardiaMobile connect to phone?

Let me know which steps you’ve tried or if you need help doing any of these! We’ll get you connected.