Even the beginning was rather bumpy. The first synchronization or initialization with the app remained at least ten times with 5% depend, eventually it worked, the data from the online portal and the data from the trackers could be synchronized and look in the app.
In the pocket carried the accuracy is also acceptable, I've found no major deviations from the counted steps. Since the unit at 0:00 clock clears its memory, you should synchronize once a day.
That also went for 5 days good. Today I am trying since 8:00 am every now and then to get the data from the tracker in the app, but no chance. If 5% is final, the app tries it then endlessly until the mobile phone "Opps, the connection was lost" message. Clearing the cache, the data and reinstall the app, restarting the phone, nothing helps.
Since the Tracker only displays the data for the current day it is without app / synchronization also not useful, so there is of me only one star.
Now the question is whether to return the tracker because a deletion of it already stored data is not possible, it can not be reset the Tracker. Thus, I do not know what data (except made steps) are still on the device.
Well, Medisana, so the nix. The BS440 Connect scale that I bought from Amazon yesterday will probably go back unopened directly, since I can not assume that this works better ...
Update 26.03 .:
I do not know how and why, but after I hung (despite half full battery) to the charger the tracker yesterday, he allowed himself to synchronize properly. And this morning, no problems. Let's see if that remains now ...
Therefore now times three stars. The device does actually what it is. Perhaps the fault lies indeed in the App ...
Update 04/24/2015
For more than a week no synchronization is possible. Neither Android nor iOS. So the pedometer migrates into the junk box ...