The author created Peggi, an arpeggio keyboard with eight keys that fits on the back of a phone. Different from chording keyboards, Peggi requires typing multiple keys in sequence rather than simultaneously. The design allows for easier typing for those unfamiliar with chording. The key layout prioritizes common letters and prevents double presses. Despite its advantages, Peggi has some disadvantages, such as potential typos leading to mistyped words. The author’s typing speed on Peggi is around 10wpm, much lower than on a traditional keyboard. The future of Peggi is uncertain, but it serves as an interesting and unique experiment in keyboard design.
https://ianthehenry.com/posts/peggi/