Which phone app can't you live without? How often do you use it? Is it a navigation aid? Coupon app? I love being able to check email and Facebook on the phone, as well as texting, but I'm not counting those as apps. Nor the two games I play.
Winner: Probably the one that I currently use the most right now is a white noise app for the grandchildren during nap time, but that is just a temporary phase. It's called Relax and Sleep, and it plays everything from rocking chairs to waterfalls. I've combined three of them (campfire, frogs and owl) to make a very soothing scenario, but the one they seem to like best is a train clicking over the tracks.
Semi-winner: I've got one that reads recipes out of Cooking Light magazine called Digimarc. I aim it at a photo in the magazine and it puts the recipes, preparations info and shopping list right on my phone.
Loser: I've got an app called Level Up that allows me to pay for certain things with my phone, but I don't use it. In fact, I've never had the occasion to.
Another lesser used app: I've got a navigation aid, but prefer paper maps as it gives me a bigger picture. By the way, good luck finding a paper map at your local store these days, they are being phased out. More's the pity, I like them. That bitty screen doesn't compare.
Used it a couple times app: Slacker Radio. I liked it until I had to give them my email. Phooey. Now I've got to set up a fake email account. Bother.
Also used a couple times when we were traveling last year: Currency converter.
So what do you like and use?