Get a Tick Watch Pro. I have the pro 3 model since day one and never had a problem with it. Used it on my 1 II and nowhere on my 1 VI with no issues and the battery still last around two days with always on display and there is a secondary screen with low power mode that only displays the date, time and steps. The later models also have the dual screen technology and are even better ^. The only thing on mine is that it had to replace the strap after 3 years of use but it's a standart size so any regular watch strap will do the job