The training shows who is tracking it
Tracks a phone a training, then that is shown as a label under the title: "Iris is tracking" or "Tracking on another device". Is it your own other device, then Continue here stands where Start tracking was, the same size, and asks first whether you take over.
On the phone, Trainings, Start tracking and the menu fit on one line. The result form is on the training page itself; there is no separate Add result button any more.