Hello, yes the app is free. At the moment I have a continuous history since August 2019, i.e. 6 and a half years. For me, this is a considerable advantage. Best regards. Yannick

I imagine that it is a return-checked appliance or a recent second-hand model ... Is this correct as it is no longer visible at the moment?

Thank you for your reply. What is the difference between this device and the other heathly home coach apar 20.- more

A small correction: every 5 minutes and not every 10 minutes ;-) Yannick

I can also add that you get the maximum and minimum values for the day, but you still have access to all the values if you zoom in 10 minutes at a time. The free application is called Home Coach. Best regards. Yannick