Small size OLED panel is befitting for Smart Bracelet , Such as 0.91" 128x32 or 0.69" 96x16 monochrome OLED.
Organic Light-Emitting Diodes (OLED) display has some advantages: Wide viewing angle,No need backlight and self emitting,Thinner and lighter, Wide operation temperature, High contrast ratio,Fast response time, Low power consumption and Durable,Flexible etc.
OLED display module has popular application. It is easy to get open source sample code from internet.
Do not hesitate, just do it .