What is the best bitcoin software Armory vs Buxtank?
I think Armory is a good wallet, but I have never used nor ever hear its name, However, why don't you use a famous wallet?
As Atomic Wallet supports around 300 crypto coins, And you are also given a private key, which gives you the freedom to login on another mobile/pc wallet. Apart from this, you can also exchange your crypto coins using Atomic Wallet.
If you want to keep your litecoin for a long time, then I prefer you to use Ledger Nano S/Nano X hardware wallet. As it is an offline wallet, and it is considered to be the most safe and secure wallet for long term holding.
For further information:
https://coinfunda.com/best-litecoin-wallets/