Awful app, but I like the built in vest Like the user below. I synchronize and it stays at 1%. Then like 5 attempts later it randomly goes to green with no indication. Also, Updating to newest version fails every time. The concept is good for safety I think and I don’t mind paying the money. BUT The WiFi and connection piece is absolute trash. I have no confidence the vest will deploy as a result of the continued problems with updating over the 2-3 months I have owned this. Would not recommend this as a safety device. Find another brand. Overall I find the app clunky. It turns off Mid ride, battery is still on but doesn’t show that on app. Would be helpful for it to show green vest is green.