FrenzKey is a custom iOS pinyin keyboard built to speed up picking the same Chinese words over and over, like when typing answers into flashcard apps such as Duolingo, instead of retyping their full pinyin every time.
As you type a prefix like chang, the candidate bar above the
keys offers matching Chinese characters and words — tap one to insert it.
Every word you pick gets remembered, so it jumps back near the front of the
candidate bar after just its first letter or two next time.
FrenzKey is an independent app and is not affiliated with, endorsed by, or sponsored by Duolingo or any other flashcard or language-learning service.