Sime is a fully offline Chinese Pinyin input method. It supports full Pinyin and T9 layouts, local phrase learning, emoji, clipboard history, quick phrases, and a local GRU sentence reranker. Input and candidate ranking remain on the device; the app has no network permission, tracking, or advertising SDK. The F-Droid build does not include the optional handwriting recognizer because its training-data redistribution terms are not suitable for F-Droid.