You downloaded it on a Sunday. Motivation felt clean then, untouched by Thursday's exhaustion or the argument you'd have Friday morning before you'd even think about lunch.
You entered your age, your weight, your goal weight. The app calculated something. You trusted it immediately.
For three days, maybe four, you logged everything. The app responded with colors. Green when you stayed under. Red when you went over. You started making decisions based on whether you'd see red later.
Then you stopped opening it.
Not because you didn't care. Because every time you did, you felt worse.
The Algorithm Knew Your Calorie Limit Before It Knew Anything About You
Here's what most food tracking apps ask when you first open them: height, weight, age, activity level, goal.