Hi there! I understand you're having trouble finding the Revive app you paid for and can't log in. Let's get this sorted out together.

First, could you confirm if you've downloaded the app from the App Store on your iPad? If it’s not appearing on your home screen, it might be helpful to check the following:

1. Search for the App: Swipe down on your Home Screen to access the Search function and type in "Revive." See if it shows up in the results.

2. Check for App Restrictions: Go to Settings > Screen Time > Content & Privacy Restrictions to ensure that there aren't any restrictions that might be hiding the app.

3. Restore Purchases: If the app is installed but you're facing login issues, often apps have a "Restore Purchases" option within their settings. Look for that to regain access.

If you still can't find it after trying these steps, let me know, and we'll explore further options! Are you satisfied with the solution I provided, or do you need more help?