When using the “Health Diary” app and changing the model.
Please refer to this help and transfer the data to the new device.
How to transfer data when changing smartphone models
https://htech-lab.zendesk.com/hc/en/articles/1500001354242 (sorry, in Japanese only)
However, if you change the model from Android to iPhone, or from iPhone to Android, your step count data will be measured and saved by the function of your smartphone, and you will not be able to carry over your past step count data.
In that case, please switch the measurement method to “other pedometer” and manually enter the number of steps from My Page.
*Once you switch the measurement method to “Other Pedometers”, you cannot switch back to “Health Diary App”.