ToneBoard Keyboard

It can be very difficult for language learners to remember Mandarin Chinese tones, especially when using language learning apps and typing with standard Pinyin keyboards. These keyboards don't require you to input tones, making it very easy to type the correct characters without knowing the correct tones. These keyboards also tend to remember your frequently used words or suggest complete phrases, which is not helpful for language learners.
By requiring you to enter tones along with Pinyin spellings before displaying characters, ToneBoard lets you practice recalling the correct tone for each syllable whenever you type.
ToneBoard works very similarly to the standard simplified Chinese QWERTY keyboard for iOS, except that it requires tones to be input while typing before displaying word and character choices.