Yes there is platform called CoinSwitch. Co would certaintly help you to invest in Litecoin and other Altcoins.
About CoinSwitch -
It is the world’s largest cryptocurrency exchange aggregator which supports 300+ coins and over 45,000+ pairs. It provides an easier way of trading through the global exchanges like KuCoin, IDEX, Changelly, Bittrex, Cryptopia, ChangeNow and Changer without creating an account on them. If you are interested in buying cryptos, do give it a try!