Hisense is the only consistent brand in the world that releases pocket friendly E INK products. Just in the past couple of months they issued the Hisense Touch HIFI Music Player, Hisense HIFI Touch Lite, Hisense Touch HIFI Museum Edition and most recently the Hisense A9, which is a fully featured flagship Android 11 smartphone.  The company tends to release 2 smartphones a year with eye-friendly E INK e-paper displays. I believe that the Hisense A9 might be the best one on the market and can easily be your primary phone. Hardware The Hisense A9 features an E INK Carta