I'm disappointed in Unstoppable: this meant I couldn't make a (small) transaction yesterday when I wasn't at home, which is the only reason I have this wallet. Obviously I didn't bring my seed phrase with me, so I couldn't recover it. And Unstoppable itself allows me to create a backup, but not to export the seed or private keys.
Can you tell exactly why you weren't able to make small transaction? Your unstoppable wallet must be configured on your phone and you wouldn't need a seed phrases to make a transaction. Or you mean you wanted to send LTC and since its not syncing so you could not send it ?
I think Cake wallet fits better for what you are looking for.
It is also open source software and they support Litecoin better, plus they have advanced privacy feature for Bitcoin called silent payments.
If I am not mistaken they also support mweb addresses for litecoin, that is very good for privacy.
I have come to know about the cake wallet for the first time. So now after your recommendation, i am confused whether to continue using Unstoppable Wallet for altcoins?