Rounding error in target power?

I noticed that the target power displayed in the app, when shown as %FTP, is sometimes off by 1, For example, if my target power is 70%, the app displays 69%. This is on an ipad.

My FTP is 279. If I go to settings and change it to 280, the 70% target is correctly displayed as 70%.

Oh that’s interesting. My developer must be doing a double conversion. %>watts>% and in that process rather than rounding maybe truncating or something. We will look at this.