This app allows you to comment, reply and manage comments on Google Drive's file.
You can also manage (list, reply, edit, delete..) the comments of all the files in the specified folder through this app.
You can share it with your friends, coworkers and clients and add comments to the file. 

This app provides a Drive Share URL to comment on the file. Tell your friends about sharing URL so they can visit and comment on shared file.
Supports posting comment with emoticons.