I take psychotropic medication and had a BMI over 30 for many years. Last year I started working on a very simple voice calorie counter for Android phones. I lost about 13 lbs using it (some weight crept up over the holidays but I am getting back on track.)
Using Google speech recognition to enter in food values is pretty cool. I do a lot of guesstimating on calories but I have found that even just tracking the number of items I eat and especially the number of servings of fruits and veggies (I try to get 7) is really handy.
My calorie data is very very noisy but the sheer simplicy of entering food so quickly makes my app enjoyable for me to use and despite the noise, a least squares fit of data does indeed seem to show that I am eating less and less over time:
The beauty of fast voice entry is that you are more likely to be honest with recording data. I can't tell you how many times I wouldn't record a late night snack on myfitnesspal. On my app, it's so easy I don't have an excuse.
Calorie values are practically only good for one or two significant digjts. Simplicy of logging is what I am finding to be most powerful.
Check out my prototypes at:
This is my weight log while using my app... I usually average about 0.25 to 0.3 lb weight loss. It may not seem impressive but I take Risperidone which notorious for causing weight gain and metabolic problems.
We are working on an iPhone version which may be out in a couple months.
If you would like to contribute to our project, check out our indiegogo campaign: