Knock app for iPhone and iPad

Knock is a communication and collaboration tool for enterprises.
Features：
1、Provide efficient and safe instant messages to make work smoother.
-Support chat 1-1 or in group chats, you can check messages status(read/unread).
-Customize your sticker，it makes work more fun.
-Share files、videos，it meets work main requirements.
2. Provide to-do and collection functions to help efficient work.
- You can add to-do items, no missing missions.
- Add messages to favorite, save important info anytime.
3. Provide professional platform to make business communication more convenient.
- Start voice calls, with clear and stable function, make problems solved online with colleagues.
- Organize conferences when multi-person involved in a project, without worrying about distance anymore.