Hi! I understand you're trying to sync your Our Groceries app between your old phone and your new phone. Let's get that sorted out! Just to make sure I give you the most accurate help, have you signed into the Our Groceries app on both devices with the same account? And are you connected to the internet on both phones?

Generally, syncing between devices depends on using the same Our Groceries account email, so your lists stay updated across phones. Here’s a step-by-step to get your lists synced:

1. On your old phone, open the Our Groceries app and confirm you are logged into your Our Groceries account (if you used an email or sign-in method).
2. Ensure your shopping lists are fully up to date and saved.
3. On your new phone, download and install the Our Groceries app from the Google Play Store if you haven’t already.
4. Open the app on your new device and log in using the same account credentials you used on your old phone.
5. The app should automatically sync the shopping lists from your old phone to the new one once logged in and connected to the internet.
6. If your lists don't appear, try pulling down the list screen to refresh/sync manually.

If you don’t recall setting up an account previously (like with an email), then syncing won't work automatically, and the lists might only be stored locally on the old phone. In that case, you can export the list manually (e.g., by sharing or emailing the list from the old phone) and then import or recreate it on the new phone.

Also, ensure both apps are updated to the latest version compatible with your Android 10 device for best syncing functionality.

Does this match what you've tried so far? If you’ve logged in with the same account but still can’t sync, let me know, and we can dig deeper into the settings or potential network issues.

For reference, here is the official user guide that talks about syncing lists between devices: OurGroceries User Guide

Are you satisfied with this solution, or shall I help you further?