Many input method apps had a small Pinyin function, such as: 1. Baidu input method: Baidu input method is currently one of the most popular input methods. It supports the small Pinyin function. You can find the small Pinyin button on the main interface and click it to enter Pinyin. 2. Google input method: Google input method also supports the small Pinyin function. You can find the small Pinyin button on the main interface and click it to input Pinyin. 3. Sogou input method: Sogou input method also supports the small Pinyin function. You can find the small Pinyin button on the main interface and click it to input Pinyin. 4. Bing input method: Bing input method is an input method developed by Microsoft.It also supports the small Pinyin function. You can find the small Pinyin button on the main interface and click it to input Pinyin. These input method apps all had a small Pinyin function, allowing users to choose the appropriate input method according to their preferences.