Because it has 3 colors. Sometimes you can put them in two colors. For the Pwnagotchi project, the consensus has been that the Waveshare B&W v2 is the best [1].

Based on my own experience (I have one) I can say it has a high enough refresh rate, and little ghosting (none is impossible as costs too much battery to do full refresh).

Also, the UPS Lite, also from China (AliExpress or whatever), is excellent.

Do keep in mind this is a specific/different project, with a much smaller screen, meant to be portable (for on the go).

[1] https://pwnagotchi.ai/installation/#color-vs-black-white-e-i...

Hi,

Paperd.Ink has a refresh rate of 4s for full refresh and <1s for partial. We're working on lowering it further.

16s would be for a full refresh though. If you're making an information based display you might only need to change a small area per update, which would be faster (though I couldn't find. any refresh speed in the datasheet).