Welcome. I started the very same way. The phone app has made ALL the difference for me, it helps me keep track of everything ALL the time, so there is no guessing in what I'm doing. I could not have made all my progress without it.
Stick to the plan and you'll do good.
"Keep your friends close, your enemies closer, and the cookies at the other end of the table."
"Eating less, moving more, not eating stupid s**t = losing weight."
"Do. Or do not. There is no trying."
- Master Yoda.
I started my weight loss journey on October 4th, 2010 - and this is what I have accomplished so far: