KhankaHard Travel Case Replacement for AliveCor Kardia Mobile ECG/KardiaMobile 6L for Apple and Android Devices

Why would one buy both the hard case and the mobile carrying pod for the Alivecore Kardia? Thank you.

Does it matter which fingers are placed on the pads? I only have my ring finger and little finger due to an amputation on one hand.

compatible with android jitterbug phone?

Can this be used by more than one person?