You can access SAP Cloud for Customer using native apps available for mobile devices. There are different native apps for C4C cloud platforms. Apart from the native app, you can also access cloud solution on HTML browser using client.
SAP C4C native app can be downloaded from the play store.
To set up the connection, you have to enter system URL under settings. Enter user name and password.
You can access different components- Appointment, Campaign, contact, email, etc.