Hi there! I understand your Astra AI app is opening to a blank screen on your iPhone running iOS 16.0. Let's see if we can get it working again.

First, could you tell me:
- When did this issue start? Was it after an app update or iOS update?
- Have you tried closing the app completely and reopening it?
- Have you already tried restarting your iPhone?

Here are some initial steps that often help with apps showing blank screens on iPhone:

1. Force Close and Reopen the App
- Swipe up from the bottom and pause in the middle on your iPhone screen to open the app switcher.
- Find Astra AI and swipe it up off the screen to close it.
- Then tap the app icon to open it again.

2. Restart Your iPhone
- Hold the side button and either volume button until the power off slider appears.
- Drag it to turn off.
- After the phone is off, hold the side button to power it back on.

3. Check for App Update
- Open the App Store, tap your profile icon, scroll to see pending updates.
- If Astra AI is listed, update it.

4. Reinstall the App
- If the above does not help, try deleting the Astra AI app (tap and hold its icon, then choose "Delete App").
- Then reinstall it from the App Store.

If none of those clear the blank screen, please let me know if you see any error messages or if the app stays stuck indefinitely on that blank screen. That information can help us dig deeper.

Are you able to try these and tell me how it goes?