I really need this ^^
Did one hour with 4 X 3 minutes at 85% effort. Temperature about 0F/-18C. I wanted to do at least 6 repeats but ran out of time because my app did not want to cooperate.
You see a gps/garmin only works if kept warm somewhere under my coat so I couldn't use that. My stopwatch also quits in the cold besides I can't see it in the dark anyway.
So I downloaded a few apps that beep on intervals that you can select yourself. You can hear it when listening to music as well.
I tried the gymboss app first but it really sucks, it stops beeping in the middle of the workout which is terrible. Now I have something else, can't remember the name but it's not perfect either. I will try a few different ones in the next few weeks.
By the way my phone quits too when getting too cold but I keep it inside a mitten in my pocket and that works so far.
I bought these and tested them out today. I'm very impressed with the performance. I had the microspikes before and really liked those too. However these are more specific for runners. They are lighter. You can really run fast on ice and packed snow. Love them!