Why a fasting tracker inside a calorie counter
Most fasting apps track one thing: the clock. But the meals in your eating window decide how a fast actually works out for you. Eat twice your usual amount in eight hours and the fast doesn't do much. NutriPixel keeps both in one place: when you ate, and what you ate.
Fasting is opt-in. If you don't turn it on, you won't see it.
How it works
- Pick a plan. Choose how many hours to fast (12, 14, 16, 18 or 20) and when your eating window opens. The default is 16:8 with the window opening at noon.
- Log your meals as usual. The time you log a meal is the time you ate it. You can change it if you're logging later.
- NutriPixel does the timing. The gap between your last meal of one day and your first meal of the next is your fast. The app shows whether you're fasting or in your eating window, how long you've been fasting, and when the window opens or closes.
Because fasts come from your meal log, you can't forget to start or stop a timer. If you skip logging for two days, NutriPixel won't record it as a 48-hour fast. Gaps that long are treated as missing data.
Choosing a fasting plan
- 12:12: a gentle start. Often just means no late-night snacking.
- 14:10: a common next step from 12:12.
- 16:8: the most popular plan, often skipping breakfast or eating dinner early.
- 18:6 and 20:4: longer fasts for people already comfortable with 16:8.
Fasting isn't right for everyone. If you're pregnant, have diabetes, have a history of disordered eating or take medication, talk to a doctor before you start.
Reminders
Turn on reminders and NutriPixel will tell you when your eating window opens, and again 30 minutes before it closes, so you can have your last meal on time.
Seeing how it's going
For each day, NutriPixel shows how long your overnight fast was, how long your eating window was, and whether you met your goal. It also tracks your streak of days on plan and flags late meals, eaten at 9 pm or after, which are the usual reason a fast comes up short.
Fasting with a calorie target
Fasting is a way to structure when you eat; your calorie target is how much. NutriPixel shows both, plus calories burned, so you can see whether your fasting days are also deficit days. Connect Health Connect and the burned side uses the steps and active calories your phone or watch recorded instead of an estimate. See the calorie deficit tracker.