The bathroom scale
Swings with water, salt and last night's dinner
Can't tell fat from muscle
Same weight for 3 months. That doesn't mean nothing changed.
Your scale shows one number. BodyFit breaks it down into fat and muscle, so you can see what your training is actually doing.
- Keto
- Carnivore
- Sixteen-eight
- Three days a week
- Six days a week
- Cut carbs
- More protein
Nobody is telling you this
Every voice online is certain, and none of them agree. You picked a lane anyway. You trained. You showed up.
Then nothing changed, or nothing you could see. The usual answer is your age, or your metabolism.
You've been flying blind.
How do you actually measure your progress?
Every method you've tried gives you a reading. None of them give you the one that matters.
Can't tell fat from muscle
Can't show what changed
Too late to adjust
No read on the outcome
Same number, any body
The bathroom scale
Swings with water, salt and last night's dinner
The mirror
Changes with lighting, angle and mood.
Can't show what changed
How clothes fit
Tells you months after the fact.
Too late to adjust
Fitness apps
Track your effort, not what it produced.
No read on the outcome
BMI
Weight divided by height. It can't tell muscle from fat.
Same number, any body
Here's the thing none of those methods could ever tell you
Real progress is your body's actual composition, specifically, whether you're building muscle at the same time you're burning fat. That's the one shift that tells the truth, because muscle only changes in direct response to real, sustained effort.
So here's the actual answer to why it doesn't show: you've been training hard, but you haven't been measuring the one thing your training actually changes.
Regular scale
Feet and legs, the rest is estimated
BodyFit
Current runs through your whole body
The shift the scale can't show you
Fat and muscle moving in opposite directions, the same shift a regular scale misses.
Illustrative example, individual results vary.
35% Body fat
20% Muscle
5% Body fat
70% Muscle
| Metric | Sedentary person | Bodybuilder |
|---|---|---|
| Weight | 105 kg / 231 lbs | 105 kg / 231 lbs |
| Size | 184.4 cm / 6'0" | 184.4 cm / 6'0" |
| BMI | 30.88 | 30.88 |
| Body fat | 35% | 5% |
| Muscle | 20% | 70% |
| Est. resting calorie burn | ~1,844 kcal/day | ~2,525 kcal/day |
42% Body fat
26% Muscle
18% Body fat
58% Muscle
| Metric | Sedentary person | Bodybuilder |
|---|---|---|
| Weight | 70 kg / 154 lbs | 70 kg / 154 lbs |
| Size | 168 cm / 5'6" | 168 cm / 5'6" |
| BMI | 24.80 | 24.80 |
| Body fat | 42% | 18% |
| Muscle | 26% | 58% |
| Est. resting calorie burn | ~1,420 kcal/day | ~1,910 kcal/day |
You train hard.
So why doesn't it show?
Real progress is body composition: building muscle while you lose fat.
The scale can't see that shift. So the work is happening, and you have no way to see it.
53%
lost fat despite the scale not moving
Average fat loss of 2.25 lbs among 115k Body Scan users over a 90-day period. Individual results vary; outcomes depend on diet, activity, baseline composition, and overall health.
Stop guessing.
Read what's underneath.
A regular scale sends a signal through your feet and estimates the rest.
99%
DEXA correlation1
40+
data points
20s
scan
How it sees this
Medical-grade reliability, without the clinic
| Criteria | BodyFit | DEXA scan |
|---|---|---|
| Radiation | Zero radiation | X-ray exposure |
| Frequency | Every day | Once a year |
| Time | 20 seconds | Scheduled appointment |
| Location | Your bathroom | Clinic only |
Based on internal validation study. Not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider for medical advice.
1 Day
You showed up. That's the hard part
Everything from here gets tracked automatically. No more guessing
14 Days
Doubt turns into a plan
The first week rarely shows movement. That's normal.
- Day 7, one week is still noise, not a verdict.
- Day 14, enough readings to see fat and muscle split from that noise.
180 lbs
Weight
23%
Fat
41%
Muscle
Illustrative example, individual results vary.
90 Days
The trend confirms itself
Consistency starts showing in the direction.
- Day 30, checking in becomes a habit you trust.
- Day 60, the trend holds even on a bad morning.
- Day 80, changes often show before the scale total does.
174 lbs
Weight
20%
Fat
43%
Muscle
Illustrative example, individual results vary.
180 Days
It compounds
More fat lost, muscle held steady, the longer you stay consistent.
- Not an experiment anymore. Just routine.
- Skipping it costs quietly, fat up, muscle down.
166 lbs
Weight
16%
Fat
45%
Muscle
Illustrative example, individual results vary.
1 Day
You showed up. That's the hard part
Everything from here gets tracked automatically. No more guessing
14 Days
Doubt turns into a plan
The first week rarely shows movement. That's normal.
- Day 7, one week is still noise, not a verdict.
- Day 14, enough readings to see fat and muscle split from that noise.
180 lbs
Weight
23%
Fat
41%
Muscle
Illustrative example, individual results vary.
90 Days
The trend confirms itself
Consistency starts showing in the direction.
- Day 30, checking in becomes a habit you trust.
- Day 60, the trend holds even on a bad morning.
- Day 80, changes often show before the scale total does.
174 lbs
Weight
20%
Fat
43%
Muscle
Illustrative example, individual results vary.
180 Days
It compounds
More fat lost, muscle held steady, the longer you stay consistent.
- Not an experiment anymore. Just routine.
- Skipping it costs quietly, fat up, muscle down.
166 lbs
Weight
16%
Fat
45%
Muscle
Illustrative example, individual results vary.
Beyond your weight
40+ biomarkers from one 20-second weigh-in. Here's what else you'll see.
BMR
Your basal metabolic rate shows how many calories your body burns just to keep running, even before you move a muscle
Visceral Fat Index
This tracks the fat stored around your organs, the kind you can't see in the mirror but that matters most for your health
Metabolic Age
Metabolic age compares how efficiently your body burns energy to your actual age, so you can see if the two are lining up
Total Body Water
This shows how hydrated your body actually is, which often explains an energy dip before hunger or tiredness does
Steps
Your daily step count, tracked automatically, so you know how much you're really moving beyond your workouts
BMI
Your body mass index, one more number for the full picture, read together with everything else instead of on its own
Weight Trend
Your weight trend smooths out the daily noise, so you see where you're actually headed, not just today's number
Muscle Mass %
This shows how much of you is muscle, so you can see it holding steady even while your weight moves.
Fat Mass %
This shows how much of you is fat, tracked apart from muscle, so a stalled scale doesn't tell the whole story
Lean Mass
Everything that isn't fat, muscle, organs, water, bone, tracked together so you see the fuller picture of what's changing
Skeletal Muscle Mass
The muscle you can actually build and lose, tracked apart from your organs and everything else
Bone Mass %
Your bone mass, tracked over time, so you know it's holding steady while everything else changes
Trunk Fat
Fat stored around your midsection, read on its own instead of blended into one number for your whole body
Trunk Muscle
Core and torso muscle, tracked apart from your arms and legs, so you see exactly where you're building
Leg Fat
Fat in your legs, read separately from your trunk and arms, so you know exactly where change is happening
Leg Muscle
Leg muscle, tracked on its own, so leg day actually shows up somewhere besides how sore you are
Arm Fat
Fat in your arms, read apart from the rest of your body, for a shape picture no bathroom scale gives you
Arm Muscle
Arm muscle, tracked separately, so you can see it building even when your overall weight barely moves
Vascular Age
Compares the flexibility of your arteries to your actual age, one more number for the years ahead
Standing Heart Rate
Your heart rate the moment you step on, a quick daily check on how your heart is doing
Leg Pulse Wave Velocity
How fast blood moves through your legs, a marker your doctor may already track for heart health
Arm Pulse Wave Velocity
How fast blood moves through your arms, read alongside your legs for a fuller cardiovascular picture
PWV Differential
Compares your legs to your arms, a gap that can say more than either number alone
Nerve Response Score
A read on how your nerves are responding, one more signal for your long term health
What you measure, you can change.
What 66,875 Withings users learned and achieved in 6 months.*
2×
Users who step on their scale daily lose more than twice as much fat as those who weigh in weekly.
1 in 4
Users over 40 discovered a hidden muscle deficit, at least 5% below average for their age.
4 in 10
Withings+ users found their vascular age was older than their real age. Invisible without measuring.
*Based on 66,875 Withings+ users who weighed in daily over 6 months. Individual results vary.
Real people, real progress
I was super grateful for the visual breakdown of metrics for each part of my body and it helped me to immediately understand how I am doing related to my health goals.
Compared to a DEXA it was within 2% on almost all metrics of body composition which I consider pretty good.
Lost 25 lbs and dropped 11% body fat in the first months of use. I had 187lbs and 33% down to 162lbs.
Still on the fence?
More ways to pay, and real answers if something's not right.
Check out in seconds with Shop Pay, and pay in installments if you want.
- 1 30-day money-back guarantee. Not the right fit, send it back.
- 2 Ships in 3-5 business days. Not weeks of waiting.
- 3 Real customer support. Someone to actually talk to if anything's wrong.
New
BodyFit
The segmental body composition scale designed for those who want to transform their body zone by zone.
HK$2,688.00 HKD
Regular price
Sale price
HK$2,688.00 HKD
Why BodyFit?
-
6 body zonesFat and muscle measured in arms, legs, torso and abdomen.
-
99% correlation with DEXAThe same accuracy standard used in clinical settings. Not an estimate.
-
20+ patentsFifteen years of medical-grade engineering, at home.
- 77% Lost 5 lbs of fat in 90 days*
- 53% Lost fat despite the scale not moving*
- 94% Gained more than 1% in muscle mass*
*Body Scan internal study, 90 days. Individual results may vary. Methodology
BodyFit
HK$2,688.00 HKD
Regular price
Sale price
HK$2,688.00 HKD
-
HSA/FSA EligibleSave an average of 30% with Truemed.
-
Shop PayCheck out in seconds, and pay in installments if you want.
-
PayPal WalletCheck out in a tap with your PayPal account.
-
2-year warranty
-
Free shipping & returns
-
30-day money-back guarantee
-
Secure & flexible payments
Complete your ecosystem
-
BPM VisionClinical Accuracy. Crystal-clear insights. Out of stock
Another tracker? It's a fair question.
Most smart devices end up in a drawer. Withings started from a different place.
We built the world's first smart scale in 2009 and created the category. Today we're reinventing it.
-
2009
First smart scale
Wifi Body Scale
-
2015
First heart-health scale
Body Cardio - with Pulse Wave Velocity
-
2026
BodyFit
Bodyfit 6-zone
750m+
body composition measurements
20+
patents
Trusted by those who demand more
From the track to the arena, the world's top athletes use Withings to understand what training alone can't tell them.
-
Health & tech youtuber
Shervin Shares
As I run marathons and test the latest tech, I'm always looking for the best tools to maintain my high performance lifestyle.
-
Professional triathlete
Sandra Huon
Knowing my precise body fat and muscle mass is fundamental. I use my scale throughout the entire season.
-
MMA pro lightweight fighter
El Hadji Ndiaye
Tracking my body composition and performance day in, day out is absolute key.
-
Professional runner
Yoann Stuck
I was overweight in 2010. Now as a pro-athlete, the scale provides me with detailed trends of my body composition so I can adjust my plans.
Frequently Asked Questions
What are BodyFit's main innovations compared to other smart scales?
BodyFit goes far beyond a traditional smart scale. Powered by 8 electrodes and BIS technology across 13 frequencies up to 800 kHz, it delivers a precise, 6-zone segmental view of your body composition, something most scales simply can't offer. A high-resolution color LCD screen makes your key metrics instantly readable, right on the scale, no phone needed.
What are the 40+ biomarkers I can get with BodyFit?
Over 40 metrics are collected, from raw signals to personalized insights. Here is the list:
- Multi-Frequency BIS
- BCG
- IPG
- PPG
- ESC
- Weight
- BMI
- Weight Trend
- Fat Mass %
- Fat Mass kg/lbs
- Trunk Fat
- Right Leg Fat
- Left Leg Fat
- Right Arm Fat
- Left Arm Fat
- Muscle Mass %
- Muscle Mass kg/lbs
- Trunk Muscle
- Right Leg Muscle
- Left Leg Muscle
- Right Arm Muscle
- Left Arm Muscle
- Skeletal Muscle
- Water Mass %
- Bone Mass %
- Lean Mass
- ICW
- ECW
- ICW/ECW Ratio
- Standing HR
- Leg PWV
- Arm PWV
- Legs/Arms PWV Differential
- Vascular Age
- Steps
- BMR
- Metabolic Age
- Visceral Fat Index
- Body Profile
- Calorie Count
- Weight Goal
- BodyPath
- Personalized Insights on Screen
- Modes Adapted to User Condition
- Air Quality & Weather
Why do I need to hold the handle during measurements?
The handle is what makes segmental analysis possible. When you hold it, the electrical current travels through your entire body, arms and torso included, giving BodyFit the data it needs to analyze each segment individually: right arm, left arm, right leg, left leg, and trunk. Without the handle, that full-body picture simply isn't possible.
Can multiple people use BodyFit?
Absolutely. BodyFit automatically recognizes up to 8 different users, each with their own profile and personal data in the Withings App. No manual switching needed.
Is the Withings App free?
All your essential data is available in the Withings App at no cost. If you want to go deeper, Withings+ is an optional premium subscription that unlocks AI-powered daily guidance, exclusive health scores, and richer personalized insights to support your journey.
How accurate is BodyFit compared to a DEXA scan?
BodyFit's fat mass readings show a 99% correlation with clinical DEXA scan results.¹ Individual results may vary, and BodyFit is not a medical device for diagnostic purposes.
I'm losing weight with a GLP-1 medication. Can BodyFit help me?
Yes. If you only track your total weight, you might be celebrating muscle loss. BodyFit tracks your muscle mass percentage daily, so you can see if you're losing muscle along with fat and adjust with your doctor or nutrition plan.
¹Internal comparative study between Withings Body Scan measurements and DEXA scan results.
99% correlation observed on fat mass results. Individual results may vary. BodyFit is not a medical device for diagnostic purposes.
²Source | ³Source | ⁴As observed over the 2024-2025 year