Hi! I understand that your Tuta app is showing a white screen even after deleting and reinstalling it on your iPhone running iOS 16.3.1. Let’s see what might be causing this and how we can fix it together.

First, just to confirm:
- Is your iPhone connected to a stable internet network (Wi-Fi or cellular data)?
- Did the white screen appear immediately after opening the app, or after performing some action?
- Have you tried restarting your iPhone since reinstalling the app?

Meanwhile, here are some targeted steps you can try next:

1. Force Close and Restart the App
Swipe up from the bottom of the screen (or double-click the Home button if your iPhone has one) to bring up the app switcher, then swipe the Tuta app off the screen to force close it. Open the app again to see if it loads properly.

2. Restart Your iPhone
Sometimes, a fresh reboot clears up background processes that could interfere with app loading. Hold the power button and volume button to access the restart option, then try the app again.

3. Check iPhone Storage
If your device is low on storage, apps can behave unpredictably. Go to Settings > General > iPhone Storage, and see if free space is available. If storage is nearly full, try freeing up some space.

4. Check Date & Time Settings
Make sure your iPhone's date and time are set automatically:
Go to Settings > General > Date & Time, and enable "Set Automatically." Incorrect time settings can cause app authentication or loading errors.

5. Update iOS if Available
Sometimes app updates depend on newer iOS versions. Check if there’s an update via Settings > General > Software Update. Although you are on 16.3.1, there might be incremental fixes.

6. Reset Network Settings
If connectivity might be an issue, resetting network settings can help (note: this resets Wi-Fi passwords and VPN settings):
Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings.

If after all these steps the white screen still appears, it could be due to a bug in the app update itself. The developers are likely working on a fix if this is a known issue reported by others recently2 6. You might want to:

- Check the App Store for any newer updates or patches to the Tuta app.
- Reach out to Tuta support at [email protected] providing your device info and the problem details.

Let me know how these steps go. Are you able to get past the white screen with these suggestions?