ALL software wallets can be compromised. Either by user error, or by other hacking or malware stealing your keys. Your best bet is multiple paper wallets with equal Litecoin denominations, or get hardware wallet like Ledger Nano.
DO NOT send all coins to a Phone Wallet like Loaf Wallet. DO NOT keep all coins in your phone / one wallet.
Also not being familiar with wallets, people / users loose passwords or seed, and then try to recover the coins. Make sure you backup both password and wallet seed. Backup your Private Keys. Make a backup of the backup and keep it in SAFE place. DO NOT tell anyone where you have them stored, or where you are keeping the passwords or private keys. Your information should be encrypted and password protected.
You should tell them to do the work themselves, as only they can keep this information safe and private. Your friend may want to look into Litecoin Electrum to start, and move coins from exchange, then move them into cold storage (paper wallet, or Ledger).
Look up Ledger Nano S and only buy from the Ledger website, not from a 3rd party as they could be compromised, or you will just be scammed out of your $ / btc / ltc by someone claiming to be a reseller. Ref links are OK, as many ppl do have those, but make sure (triple check) that you are buying from the legit Ledger website.
Maybe this was posted before, so read up on Forums on Litecoin wiki. Good luck.