Hi there! It sounds like you're experiencing some loading issues with the Hopster app on your devices. Let’s see if we can get that sorted out.

First, could you confirm if both your iPhone and your son’s tablet are running the latest version of the Hopster app? Sometimes, outdated apps can lead to performance issues. Here’s how to check:

1. Update the App:
- Open the App Store on your iPhone and go to the Updates section to see if there’s an update for Hopster.
- For your son's tablet, check the Google Play Store for any updates available for the app.

If both devices are updated, let's try a few more troubleshooting steps:

2. Check the Internet Connection:
- Ensure that both devices are connected to the internet. You might switch between Wi-Fi and mobile data to see if that helps.

3. Clear the App Cache (for Android):
- If your son’s tablet is an Android device, clearing the app cache could help. Go to Settings > Apps > Hopster > Storage, then select Clear Cache.

4. Restart the Devices:
- Sometimes a simple restart can resolve the loading issues. Please restart both the iPhone and the tablet.

5. Reinstall the App:
- If the problems persist, uninstalling and reinstalling the Hopster app on both devices could help.

If these steps don’t solve the problem, it might be a temporary issue with the Hopster servers. In that case, checking their official website or social media pages might provide additional information about any outages.

Let me know how it goes! Are you satisfied with the solution I provided, or is there anything else I can assist you with?