Hi there! I understand you're having trouble with the littlelf smart app disappearing from your home screen on your Kindle. Let's work together to figure this out.

First, can you check if the app is still installed on your device? Here's how you can do that:

1. Swipe down from the Home screen to access your notifications and settings.
2. Select "Settings."
3. Tap on "Apps & Notifications."
4. Choose "See All Apps."
5. Look for the littlelf smart app in the list. If you can see it there but it’s not on your home screen, we can move on to restoring it to the home screen.

If the app isn't listed, you might need to reinstall it. Typically, the littlelf smart app can be found on the Amazon Appstore.

You can also try the following steps if the app is installed but not showing on your home screen:

1. Go back to the "Apps & Notifications" section.
2. Tap on "See All Apps."
3. Enable the "Show System" toggle button to display all apps.
4. Look for the littlelf smart app and select it. If it's disabled, tap on "Enable."

Let me know if you're able to locate the app or if you need more help! Are you satisfied with the solution I provided?