Consider Amazfit Bip/Bip R/Bip S. The original Bip has 2-4 weeks of battery, GPS, heart rate monitor and always on reflective color screen. Bip S and R are next

Consider Amazfit Bip/Bip R/Bip S. The original Bip has 2-4 weeks of battery, GPS, heart rate monitor and always on reflective color screen. Bip S and R are next generation with better screens but shorter battery life (1-2 weeks depending on usage). I used by Bip as a regular watch due to long battery life, heart rate monitor (every 30m) and replacement for my phone during runs (though not that well operating in a city, better to use on open spaces). Bip costs less than 70 bucks.