Albeit a bit more pricey I love the Garmin Forerunner Smartwatches. There is a very wide variety at many different price points, no subscription and access to all data, integrates well with other services. Not sure about the OLED versions but I love the non OLED ones. Touch display, color (although not as vibrant), smartphone connectivity (e.g. notifications) and even payment (credit card on the watch, no phone needed)… with all that the battery still lasts about 2 weeks.
Sorry for shilling. There was a time when I hated Garmin. But their watches have come a long way.