Except it's not 2017 any more and there are actual apps that do that now. Source: about 3 years ago

When I was learning how to sprint (300m intervals) I used Moov and it was amazing. Also tracks cadence and does the voice over coaching. Tells me to speed up, swing my arms more, etc. Can't recommend it enough, and it's probably even better since mine was an earlier version. https://welcome.moov.cc/. Source: over 1 year ago

You could also try something like the MOOV HRM which goes in a headband on your head or on your ankle. https://welcome.moov.cc. Source: over 2 years ago

Check out: Https://welcome.moov.cc/. Source: over 2 years ago

According to Runner's World: Complete Guide to Running, you want to walk before you run. And you can start with 30 min. Of walking daily. This helps your body with conditioning. I also highly recommend using something that will assist you with cadence to prevent injury. Some years ago, I had gotten my running time down to sub-7 minutes again for the first time since high school, but was experiencing incredible... Source: about 3 years ago

Not a watch, but I still like the moov now. It's clearly not being developed anymore but is a bargain now, assuming the app continues to work when the company inevitably goes away. Ignore the price on the front page and click through to the shop and it should show up as a lot cheaper. Source: about 3 years ago