Hey! Hope this reaches someone working on the Tapo app! 

Just got  the bulbs and I'm really hapy with them so far. I only wish there was a mode for the colors to gradually chage, the current Relax mode is way too fast even on the slowest setting and the Breathing shift style is distracting as well.

When I select the colors in the menu it shifts nicely from one color to the next so it should be possible. Hope to see this function some day! Thanks and good luck!