If the Tricount app crashes right after starting, displaying only the splash screen for a brief second, you can attempt the following step-by-step troubleshooting methods to resolve the issue:

1. Check for Updates: Ensure that you are using the most recent version of the Tricount app. Go to the app store (Google Play Store or Apple App Store), and check for any available updates. If an update is available, install it to see if it resolves the crashing issue.

2. Restart Your Device: Sometimes, a simple restart can fix issues with apps. Turn off your device completely and turn it back on before attempting to open the Tricount app again.

3. Clear App Cache (Android): If you're using an Android device, clearing the app cache may help:
- Go to Settings > Apps > Tricount.
- Tap on Storage, then select Clear Cache.
- Reopen the app and check if it still crashes.

4. Reinstall the App: Uninstall the Tricount app from your device and then reinstall it. This can help resolve problems caused by corrupt installation or files:
- On your device, long-press the app icon and select Uninstall.
- Visit your app store again, search for Tricount, and install it.

5. Check for Device Updates: Make sure your operating system is updated. Go to Settings > About > Software Updates to check if there are any available updates for your device.

6. Check Permissions: Sometimes apps require specific permissions to function correctly. Go to Settings > Apps > Tricount > Permissions and ensure all necessary permissions are granted.

7. Disable Battery Optimization (Android): If you are using an Android device, it's possible battery optimization settings are affecting the app. Disable battery optimization for Tricount:
- Go to Settings > Battery > Battery Optimization.
- Find Tricount and select Don't optimize.

8. Try Other Devices: If possible, try logging into your account on another device. This will help determine whether the issue is with the app or your specific device.

If the app continues to crash after following these steps, consider reaching out to Tricount support for more specialized assistance. You can also check forums or community discussions for further insights related to this issue - learn more - learn more - learn more.