Pulse Monitor

I'm kinda beginner with Arduino but I'm thinking of my first Arduino project be Pulse Monitor. Before engaging to such project I wanna ask if these are possible to be made.

  1. I want to make my pulse monitoring comfortable and attached to a glove, any recommended modules to maximize comfort of user?

  2. I intend to create my pulse monitoring to save data on SD card for the record. What module and any existing codes that will save sensor data on the module and can be retrieved?

  3. Finally, I also intend to develop an android application where it can get the past and present data of pulse monitor. Any recommendation and existing project(s) that will help me achieve this?