I'm not into the apps or calorie counting, so I can't help you there, but there are three things you can do to drastically improve your weight:
Breakfast and lunch must change. Nothing will happen until you stop with the fast food twice a day. A cup of yogurt for breakfast, have some nuts around 11am to hold you over, and something reasonable for lunch - preferably something without bread. That's step one.
Step 2 is stop w/ the diet soda and iced tea. Drink water. If you must have flavor, buy some flavored seltzer. Don't drink your calories, and diet soda is horrible for you.
Step three? Alcohol. Cut down. Cut it in half, in fact. That you say you are reading what others drink and saying "well, I'm ok then" is a bit of a clue that yea, you drink too much. I'm 49 and cut my drinking in half about a year ago - just kind of naturally happened, as the buzz just wasn't agreeing with me anymore. I drank like you say you do - only 2 or 3 days a week, a few drinks each time, or maybe 6-8 beers on a Saturday... I was doing maybe 12-15 drinks a week. I cut that in half, and almost immediately lost 10 pounds without even trying. I'm down to maybe 5 drinks a week now - the upside is, I lost a lot of tolerance. 2-3 beers is a fine evening now.
Do these three simple things, and everything will improve.