Your data in the General Health app shows past performance over time. This helps you spot patterns, and to correct them. It is not possible delete your past data while still maintaining the same account. However, manually added data entered still that day can still be adjusted on the same day you entered it. To adjust manual data,

* Go to the Dashboard

* Find the data you want to change

* Tap the pencil icon

* Enter the adjusted data

* Tap the tick (?) symbol to save the data

* You can also tap the 'x' to cancel the numbers you just entered If you close your account, however, all your data will be deleted. See FAQ on 'How do I delete my account?'