Written by: Jin Fujisaki / Published: 2026-02-04
I know "recording diets" are effective, but I just can't keep them up. The reason? It's a hassle. Most typical "smartphone-linked scales" use Bluetooth. That means before stepping on the scale, you have to pull out your phone, launch the app, and wait for it to pair. Are you really going to do all that during a busy morning, or while standing naked after a bath? No, you're not.
"If only the recording could just happen without me even noticing." Granting that wish is the "Body Smart" from Withings, a smart device brand from France. This is a device that completely "automates" your health management.
| Wi-Fi sync, not Bluetooth. This is the decisive difference
image Apple
The biggest feature of this scale is that it connects directly to the internet via "Wi-Fi" rather than Bluetooth.
It's simple to use. Just step on it. You don't even need to have your phone nearby. When you step on the scale, the measurement finishes in a few seconds, and the data is sent to the cloud via Wi-Fi on its own and recorded in the app.
Just step on it without thinking after your bath, and the next morning on your commute, when you check your phone, last night's weight graph has already been updated. This "unconscious" UX is the very key to keeping it up.
| Some days you don't want to see the numbers. The "Eyes Closed" mode
image Echoes Gadget
During a diet, the morning after you've overeaten the night before. Have you ever been so afraid of seeing a higher number that you stopped stepping on the scale altogether?
The Withings Body Smart has an "Eyes Closed (weight-hidden) mode" that rescues that delicate maiden's heart (and middle-aged heart). When set to this mode, the scale's display doesn't show specific "kg" values. Instead, it shows encouraging illustrations or just a comparison with the previous day.
Of course, it's still recording everything internally, so you can check the app later when you've worked up the courage. It's a feature full of kindness, designed to spare you the "stress of facing reality" and to keep your "daily weigh-in habit" from breaking.
| From visceral fat to heart rate. A 10-second health checkup
image Withings
It doesn't just measure weight. In addition to body fat percentage, muscle mass, bone mass, and water percentage, it can also measure your "visceral fat index," an indicator of health risk. Furthermore, by passing a weak electric current through the soles of your feet, it can even measure your "standing heart rate."
The display is a high-resolution color LCD, and after weighing in, it even shows you "today's weather" and the "air quality (PM2.5)." "Stepping on the scale just to check the weather" — it even creates new motivations like that.
| Who is it for? For chronic three-day-monk quitters
image Withings
This product truly shines for the following kinds of people.
- People who have failed at "recording diets" many times in the past
- People who find it a hassle to bring their phone into the changing room
- People whose mood is easily swayed by daily weight fluctuations
- People who want to integrate data with Apple Health or Google Fit
The price is around 14,000 to 17,000 yen. It is expensive compared to a 3,000 yen scale, but this isn't a "scale" — it's the cost of hiring a "personal health management secretary." It collects data on its own, graphs it on its own, and confronts you with reality (or gently hides it from you). As an investment in your health, nothing is more reliable.
| Summary: What you need isn't "willpower," it's a "system"
image Withings
With the Withings Body Smart, there's no need to "record things diligently." All you need to do is keep it in its usual spot in the bathroom.
Your unconscious behavior gets turned into data, and before you know it, your awareness of your health has changed. Please experience this "behavior change" through technology for yourself.
