Smoothed 7-day curve
ZymFit shows the 7-day moving average by default, not the raw daily number. You see the slope, not the saw-tooth. The daily dot stays visible in the background if you want to check it, but the smoothed curve is what guides you.
Feature · Progress
Progress tracking: see what actually works.
The mirror lies, sensations drift, and the scale reads differently every morning. ZymFit connects a smoothed weight curve, your nutrition journal, explicit product and meal scores and your daily streak, so you can link consistent choices to the real trend.
Weight
Smoothed 7-day curve
A 7-day moving average trend to ignore daily noise and see the real direction.
Nutrition
Meal journal
Barcode or AI photo scan — every logged meal builds your history day after day.
Scores
Two scores, two uses
Overall product quality; goal-, portion-, meal-time- and budget-aware fit for a meal.
Consistency
Daily streak
Nutrition actions keep your streak alive, with no rankings or social competition.
01The intent
Why track (and not just feel).
Sensations matter, but they drift. A great session can follow a bad week of eating. A « bloated » stomach on a Tuesday might just be salt, not fat. A scale up 1.5 lb on a Monday says nothing about your month. Tracking gives you a stable floor to make decisions — bump calories, add a session, back off, stay the course.
ZymFit doesn't ask you to become an accountant. Weigh in when you can, take a photo once a month, measure when you remember. The data piles up on its own and the trend reveals itself after a few weeks. It's a tracking tool, not a mandatory logbook.
02The scale
Track your weight without obsessing over it.
Today's weight says nothing. The 7-day trend says everything.
Flexible ranges
7 days, 30 days, 3 months, 1 year. Zoom in on the last week to sanity-check consistency, zoom out to a year to see where you stand compared to last winter.
Flexible weigh-ins
You don't need to weigh yourself every day. Three to five weigh-ins per week, in the morning on an empty stomach, are enough to surface a stable trend. Missing a day breaks nothing.
To understand why the moving average is more honest than any single daily number, we wrote a full guide on weight tracking and the true trend covering the effect of water, salt, digestion and cycle. This logic is central for a weight loss goal, but also for a controlled muscle-gain phase where you want to progress without letting things slide.
03The journal
Every plan
Nutrition journal: every meal becomes useful data.
Scan a barcode or photograph a plate. ZymFit identifies the food and calculates calories, macros and the meal score in seconds.
What your ZymFit journal contains
Barcode scan (3M+ products)
AI meal-photo scan
3,000+ ANSES foods in 7 languages
Reusable saved meals
Meal score out of 100
Daily, weekly and monthly history
Free: 7 barcode scans and 3 meal-photo analyses per week. Pro: unlimited barcode scans and up to 8 meal-photo analyses per day.
Every entry builds your journal. A product keeps a stable overall quality score; a meal receives a contextual score based on its portion, meal time and what remains in your day. Those meanings stay separate. See all ZymFit nutrition features.
04The scores
Two scores, two different questions.
A barcode describes overall product quality. A logged meal describes how that portion fits the rest of your day.
Overall product quality
The same product keeps the same score, whatever your goal. Nutrition accounts for 60%, additives for 30% and organic certification for 10%; NOVA remains separate information.
Meal fit for the day
The meal score uses your goal, portion, meal time and remaining calorie/macro budget. It can change as your day fills up.
Meaning always visible
Every screen labels whether it is showing product quality or meal fit, so the two scores are never blended into a misleading average.
No hidden objective under a barcode score
Barcode results stay about the product itself. Goal, portion, meal time and remaining budget only enter the meal score, where that context is useful and clearly named.
05The history
Long-term history: connecting cause and effect.
A single data point is worthless. A data point cross-checked with ten others becomes an answer.
Unlimited history on every plan
Your meal, score and weight history is kept with no time limit on every plan, Free included. Scroll back to any week and compare your nutrition log with the smoothed weight trend.
Everything linked to your account
Weight, meals, calories, macros and your daily streak stay tied to your account. You can revisit complete days and compare consistency with the smoothed weight trend.
On Pro, the weekly coach uses sufficiently complete logged days, calorie and protein adherence, your check-in and weight trend to suggest one mission or target adjustment that remains yours to accept. This history also makes the other ZymFit features more useful — nutrition scores and target proposals rely on this history.
06The streak
Daily consistency counted automatically.
There is nothing extra to check off. A nutrition action moves your streak forward, and ZymFit can warn you when it is at risk.
Automatic counter
Log a meal, scan a product, track water or weigh in and the day counts. No manual checkbox, rankings or social competition.
Consistency, not performance
The streak reflects regular use, not calories or a perfect score. Pro can protect up to two missed days per month with the streak freeze.
Structured JSON export for everyone
From Settings > Account, download the available structured account data as JSON at no extra cost. Binary files are not bundled and technical push credentials are redacted.
07The plans
Which plans for what.
Weight tracking, nutrition journal, explicit product and meal scores, unlimited history and structured JSON export are free. Pro raises scan limits and adds the weekly coach.
Free
- Smoothed weight curve
- 7 barcode scans/week
- 3 AI meal-photo analyses/week
- Clear product and meal scores
- Unlimited history
- Structured JSON export
Pro
Popular- Everything in Free
- Unlimited barcode scans
- Up to 8 meal-photo analyses/day
- Weekly nutrition coach
- Custom macro targets
- Streak freeze: 2 protected days/month
Pricing details and the rest of the features are on the full plans and pricing page. Pro unlocks unlimited barcode scans, up to 8 meal-photo analyses per day, custom macro targets, the weekly coach and streak freeze.
Frequently asked questions
What people ask us most often.
How does the ZymFit streak work?
A day counts as soon as you take a nutrition action: log a meal, scan a product, track your water or weigh in. The streak uses your local date and is simply a consistency counter — no workout rankings or social points.
Why distinguish today's weight from the trend?
Your daily weight swings with hydration, digestion and how salty yesterday's food was. That's noise, not signal. The 7-day moving average smooths those swings and shows the real direction over the month. We've written a full guide on weight trend tracking if you want the logic in depth.
Why are there two kinds of score?
A scanned product gets a stable score: 60% nutritional quality, 30% additives and 10% organic certification. NOVA remains separate information. A logged meal gets a different score based on your goal, portion, meal time and remaining calorie/macro budget. ZymFit keeps those meanings separate.
Can I export my data?
Yes. The built-in structured JSON export is free from Settings > Account. It includes the available account data such as your profile, meals, weight, hydration, scans and lists. It does not bundle binary files, and technical push-notification credentials are redacted.
What happens if I change phones?
Your account data — including weight, meals, scores and current streak — is synced with your ZymFit account and returns when you sign in on the new device. You can also download the free structured JSON export beforehand as an independent local archive.
Does ZymFit measure my body fat percentage?
No. ZymFit does not measure body composition. That needs a dedicated tool such as a bioimpedance scale, DEXA scan or skinfold calipers, and interpretation remains debated. ZymFit tracks what it can measure reliably: your weight, nutrition intake and consistency.
See also
Around progress tracking.
Nutrition
Meal photo scan
Snap your plate, AI recognizes the foods and computes calories and macros before you confirm.
ExploreScoresProduct score vs meal score
Barcode scans rate overall product quality; meal scores show how a portion fits the rest of your day.
ExploreOverviewAll features
Scans, nutrition log, weight tracking and shopping lists — the features actually available.
ExploreSix months go fast. Keep the trail.
Download ZymFit and start tracking your progress tonight. Free plan, no credit card, with structured JSON export included. Pro is available when you want higher scan limits and the weekly coach.