I am speaking to the company on Thursday as this “other” reading is alarming me too. I am a 58 year fit personal trainer and I have no heart problems and other devices confirm that my heart is ok apart from the odd ectopic beat. My ECG even when just wearing doing normal things shows me an “other” reading of between 10 and 50%. There seems to be nothing on the website to suggest why this might be and when I look at the flags created that show “other” there seems to be nothing shown on the corresponding ECG. I find nothing to explain if everyone gets “other” readings and how worrie we should be when we get them. I have no other symptoms but feel like not wearing the device if I cannot find answers to these questions as it is alarming me more than helping me. For instance, on a health person i trials – do they show any “other” at all. Or on a person witgh knownatrial fibrillation do they show “other” 100% of the time. We need more infortmation. My heart strain only goies up to 2.5 when I am warming up or walki ng but when I am actrually training it rarely leaves zero. Bit confused like you are.