Hi there! I understand you're having trouble downloading the Hopper app on your device. Let's see if we can get that sorted out together.

To start, could you tell me a bit more about what's happening? For example:
- Are you getting any error messages when you try to download the app?
- Which app store are you using (Google Play Store or another)?
- Have you been able to download other apps without issues on your device?

Knowing this will help me guide you better. Meanwhile, here’s a general step-by-step you can try to download the Hopper app on your Android device:

1. Check your Internet Connection: Make sure you have a stable connection, either Wi-Fi or mobile data.
2. Open Google Play Store: This is where you normally download Android apps.
3. Search for "Hopper": Type "Hopper" in the search bar and look for the app named "Hopper: Hotels, Flights & Cars."
4. Check Compatibility and Availability: Sometimes an app might not be available for your particular device or region. Make sure your Android OS version 10 is supported (which it usually is for Hopper).
5. Clear Play Store Cache: Go to your device's Settings > Apps > Google Play Store > Storage > Clear Cache. Then try searching and downloading again.
6. Restart Your Device: Sometimes a simple reboot can fix app download issues.
7. Try Direct Link: You can try downloading the app directly by visiting the official Google Play page for Hopper here: Hopper on Google Play Store

If the app still won't download or shows as unavailable, it might be due to a temporary issue or regional restrictions. Let me know what you find and any specifics from your experience, and I can help with more tailored steps or escalate further if needed.

Are you seeing any messages or other clues when you try to download?