To resolve the issue of the Substack app not opening correctly on your iPad, displaying a static picture, follow these steps:

1. Force Close the Substack App: Double-press the Home button or swipe up from the bottom of the screen (if your iPad does not have a Home button) to bring up the app switcher. Locate the Substack app and swipe it up to force it to close completely.

2. Restart Your iPad: Turn off your iPad by holding down the power button until the "slide to power off" option appears. Slide to turn off, then wait for a few moments before turning it back on.

3. Update the Substack App: Ensure the Substack app is updated to the latest version. Go to the App Store, tap on your profile picture at the top right, and swipe down to see any available updates. If the Substack app is listed, update it.

4. Clear Cache: Although there's no direct option to clear the cache on an iPad, performing the steps above can help refresh the app's resources.

5. Reinstall the App: You've mentioned attempting this already, but ensure you do it properly:
- Delete the Substack app from your iPad by pressing and holding the app icon until you see a menu or the icons start to jiggle. Tap "Remove App" and then "Delete App".
- After it has been uninstalled, go to the App Store and reinstall the Substack app.

6. Check for iOS Updates: Go to Settings > General > Software Update to check if there are any available updates for your iPad’s operating system. Updates may contain performance improvements and bug fixes.

7. Contact Substack Support: If the problem persists, consider reaching out to Substack support for assistance. You can find additional support options on their official FAQ page - [learn more].

8. Explore Community Insights: Other users have reported similar issues and some have shared solutions. For example, discussions on Reddit highlight that uninstalling the app can provide a temporary fix - learn more.

9. Check the App's Functionality with Different Connections: Sometimes, network issues can also lead to display problems. Switch between Wi-Fi and cellular data to see if that improves app performance.

By following these steps, you should see improved performance from the Substack app on your iPad. If ongoing issues continue, consider monitoring for any official updates regarding app stability from Substack.

How to clear cache for apps on an iPad?

To clear the cache for apps on your iPad, follow these steps:

1. Check App Settings: Most apps do not have a direct option to clear the cache. However, some apps, like Safari, allow you to clear cache and data within their settings:
- Open Settings on your iPad.
- Scroll down and select Safari.
- Tap on Clear History and Website Data to clear some cache related to browsing - learn more.

2. Offload the App: If the app you want to clear the cache for doesn't have a built-in option, consider offloading it:
- Go to Settings, tap General, then iPad Storage.
- Scroll and select the app you wish to clear the cache for.
- Tap Offload App, which will remove the app but keep its documents and data (this can help clear some temporary files).
- Reinstall the app by going back to the App Store, finding it, and tapping "Reinstall".

3. Delete and Reinstall the App: This is the most effective way to clear all app cache:
- Press and hold the app icon until a menu appears or the icons start jiggling.
- Tap Remove App and then Delete App.
- Visit the App Store, search for the app, and reinstall it.

4. Use Third-Party Apps: Some third-party apps claim to help clear caches across various apps on your iPad, but use them with caution and check trusted sources for recommendations.

5. Reset All Settings: If you are experiencing persistent issues and other methods have not worked, consider resetting all settings. This does not delete any data but will reset system settings to default:
- Open Settings, tap General, scroll down and tap Transfer or Reset iPad.
- Choose Reset, then select Reset All Settings.

Following these steps should help you effectively clear the cache for apps on your iPad. If you’re specifically looking to clear Substack's cache, reinstalling the app is your best straightforward approach - learn more.