Litecoin app has stopped

Dear Technical support

I have installed application litecoin that was adviced on official website, , application worked properly 1 day, while it was working I transferred some coins there, but on next day when I trying to launch it it says me error that litecoin has stopped. I didn’t make backup of keys after installing. Please help me to fix application or advice how to find keys in my phone and use it on another phone. On wallet was not small amount of coins. If someone help me I will be grateful fully. Thanks in advance