I have looked for this myself, and come to the conclusion that it doesn't exist unless you're willing to buy a second hand, bulky hospital scale.
Measuring human weight is harder than it seems (we don't stay still).
Most scales use a strain gauge sensor that detects bending of a metal arm through changes in resistance. It's pretty noisy and needs averaging. There's some integrated circuits to relate the resistance to weight. Most do some factory calibration only around the target weights (median adult weights).
Look instead for a scale that explicitly states that it is accurate over the whole range (e.g. baby to 220lbs). Usually there's tradeoffs - e.g. the displayed weight won't 'settle down'. I have one like this and it works better than any previous one I had (tested by adding calibrated weights), but I hesitate to recommend since it's a low cost consumer model.
My $10 +decade old one CR2032 powered one does that just fine.
Accurate enough for weight control (doesn't drift from day to day), no "stuck weight" problem mentioned either. Just need to wait 2 seconds for self calibration to finish
If your scale doesn't give you a different weight from one day to the next, either you are a very unusual human that doesn't ever change weight somehow, the scale only gives two sig figs, or it's lying to you.
Humans are constantly changing weight, with every single breath you take.
I eat once a day and weight myself in the morning before eating or drinking anything, hence the consistency. If I weight myself in other parts of the day I get different results so it isn't just weight stuck at same level. So I can see the trend based on what I ate last few days pretty quickly.
I also tested on small weight and what my kitchen weight calls 3.016KG my bathroom weight calls 3.0KG so I'm pretty sure it's still reasonably accurate in absolute scale.
There are still inexpensive purely mechanical scales. I wouldn't expect much accuracy from a spring-based scale, but it should be consistent barring significant temperature variation.
Personally, I've only ever had one scale in my life that I thought might be using memory to give false consistency. But even then, it was short-term, not long term. I.e. if you stepped off and back on, it might bias towards giving you the same weight. If you walked away for a bit, then came back with a small extra weight in your hand, it was accurate.
My withings is constantly .2 fluctuating. If it’s faking that I’m going to chuck it out the window. It’s a very good scale, in aggregate the readings are useful.
It has wifi and bluetooth, so it always syncs up with your phone and can track multiple people. I don't really trust the body measurement stuff but use it for measurement per measurement information. The heart rate is kind of nice to track too.
Even cheaper, and IMO slightly more reputable, the $50 withings scale is pretty great, and it's half the price of the version with useless body composition measurements.
Looks good too. I bought pre-doorbell controversy along with a doorbell. It appears Eufy/Anker is doing better now.(0) After having a couple different webcams taken over by security holes, mine only point outside and are hidden.
What about getting two cheap scales and averaging their values? From my third-world perspective, it sure beats the other suggestion from one of the other commenters to get a $80 digital scale with bluetooth, wifi, fridge and Amazon prime integration.
You don't even need the Wii itself! You can connect to the balance board via Bluetooth, and there are several libraries out there that can read out its data (and that of the Wiimotes as well).
Yes, you get all the data. Sometimes you can see even more than what the Wii shows you. For example, with the Wiimotes, it actually shows you the position and brightness of the top 3 or 4 infrared light sources in its field of view (from that it can derive the position of the "sensor" bar).
If you have a link, it would be much appreciated. When I looked I didn’t see anything that came close to the functionality that the Balance Board had when attached to the Wii. It’s nice that the raw data is available, but unless it’s presented in a way that’s useful, it’s not that interesting.
The only project I found was FitScales and it has been dead for a long time now because Android Bluetooth changes made it incompatible with newer devices.
Measuring human weight is harder than it seems (we don't stay still).
Most scales use a strain gauge sensor that detects bending of a metal arm through changes in resistance. It's pretty noisy and needs averaging. There's some integrated circuits to relate the resistance to weight. Most do some factory calibration only around the target weights (median adult weights).
Look instead for a scale that explicitly states that it is accurate over the whole range (e.g. baby to 220lbs). Usually there's tradeoffs - e.g. the displayed weight won't 'settle down'. I have one like this and it works better than any previous one I had (tested by adding calibrated weights), but I hesitate to recommend since it's a low cost consumer model.