The Iron Tracker App http://iron-tracker.ca/ allows you to enter your blood iron data into the app. This data is stored locally on your own phone. This is the only copy of the data that exists, in order that your privacy is maintained. As none of your data is ever transferred from your phone to anywhere else, your privacy remains completely in your own hands. If you wish to make an external copy of the data for your own purposes, this can be done through the app Settings tool.