The point of Litewallet is to make it very easy to use.
Sometimes, it might be too simple.
Most users use the History view quite a bit. On the top left is the Litewallet balance. When you receive Litecoin from one of generated addresses, Litewallet will add the values. If you want to see the balance in your local currency, tap on it!
Tap it again to switch back to Litecoin. 1 Litecoin is 1 Litecoin so don't expect that value to change unless you spend or receive Litecoin (LTC or Ł).
If you like to see it in your local currency, that value will change regularly. Litewallet updates the fiat to Litecoin value every few minutes. To see the value of 1 Litecoin it is in the Litewallet lock screen shown in your chosen currency (How do I set my local currency?)