Aria 2 can't differentiate between users

[EdHenderson]

Our Aria 2 can't differentiate between whether it's myself or my wife weighing in. Once either of us has weighed in it just selects an account and syncs without giving the option of saying whether the user is the correct one or not. 

On top of this because it's not selecting the right user it is giving incorrect measurements. For example if I step on the scale (and it assumes I'm my wife) it gives her body fat % even though we are very different percentages. This fact makes me totally doubt this scale is capable of reading anything given it's not reading out the stats for the person currently stood on the machine!!!

[JuanJoFitbit]

@EdHenderson welcome to our Fitbit Community! I'm happy to assist you with your Aria 2 since it's not assigning your weigh ins to the correct user.

I'd like you to follow the troubleshooting steps that are listed in this help article. These steps are great in order to reassign your weigh ins.

Keep me posted on the outcome! 😀

[EdHenderson]

Hi @JuanJoFitbit 

Thank you for the speedy response. 

I have followed these steps and now know how to reassign a weigh-in to the correct user which is very useful, thank you. 

It us still frustrating however that the scales still fail to recognise me and I'd rather not have to reassign the measurements after every weigh in as this is a problem caused by the device not working as described on purchase. 

My other concern is that when I weigh myself, the weight is correct (at least I think it is) but it still ready my wife's body fat percentage. When the device does recognise me my BFP is completely different so this would imply the device is not taking correct measurements. On top of this, after I have reassigned a weigh in back to my profile it changes the BFP to what my measurements are more likely to be.  

To clarify, if I weigh myself and the scales give me a BFP of 40% on my wife's profile. I then reassign the weigh in to my profile which then reads 20%. 

These measurements are accurate to each of us but how can the scale read me incorrectly while I'm standing on it but then change to my BFP after I reassign through the app. That makes it sound like it's just fabricating the results! 

Thank you for your help, 

Ed 

[LZeeW]

@EdHenderson   It's actually normal physiology for men and women to have different body fat percentages.  It's our hormones.  I'll just leave it at that or a very wordy physiology lesson will follow.

[EdHenderson]

Hi @LZeeW 

The bit I’m struggling to understand is  when I was the only user on the device it was giving me a BFP of 20%. I then added my wife who reads at 40%. 

The scales now no longer recognise me (even though we’re both set up as users) and If I now step on the scales it reads me as 40% but thinking I’m my wife (as it then shows her personalised icon after the weigh in). 

i just would have thought it would read me as 20% again? When i reassign the weigh in back to my profile it then switches it back to 20%. Is this because it reads male and female percentages differently? (I’m assuming so due to heights etc but just want to learn so I can understand!) 

Any help or clarification would be great appreciated!!

many thanks 🙂

[LZeeW]

@EdHenderson   You asked for it, but I will try to keep it simple.  Men make far more testosterone than women (yes, women do make small amounts).  This hormone difference help men create more muscle mass.  Notice how male body builders can get huge muscles, but female body builder just can't get there.  An extreme example, but I am trying to make a point.  If you compare a man and a woman of equal height (same weight or different weight), the man will have more muscle mass.  If you compare a man and a woman of equal weight, the woman will have a higher percent body fat.  On the inside, the woman just can't have the muscle mass (or bone mass) as the man.

If you and your wife are close in weight, then your scale is having difficulty telling you apart and assigning the measurement to the correct user.  No matter who steps on the scale, the measurement is being assigned to her.  Here is Fitbit's recommendation to help your scale recognize you:

• Fitbit says weigh yourself 5 times in a row, BUT
• If the scale shows your wife's icon, you need to wait until that weight syncs and you reassign it to you before stepping on the scale again.
• You should do this at least 5 times.
• Your wife might need to do this, too.

If you can't get the scale to recognize you, then you should respond in this thread and tag @JuanJoFitbit for more help.  If you and your wife are not close in weight, then definitely tag @JuanJoFitbit for more help.

[Russoo]

This doesn't adress the question as to why a random body fat percentage is shown rather than the one just measured. Feels like the scale is guessing to me

[Alan_Rose]

I think the body fat is calculated using your helght and gender as well as your weight so if the scales think it is your wife then it will use your weight, her height and her gender to give the body fat. I think anyway but may be wrong.