New Android APP Development - Add some functions to existing apps

Summary : Add some functions to existing apps

Required function :
1. 1:1 Inquery List and Regist Screen
2. Like Mark function
3. Follower&Following function
4. SHUFFLE PLAY
5. VOICE MAIL
6. MULTIPLE CHOICE OPTION

Development language : Android

*You can develop it by adding it to the existing app source
*Design(Figma) & Source provided.
*API Connection document is provided(API is prepared).

Period: Within 1 weeks
Cost: Suggestion please