I'm very new here. I'm not even sure which AP is right for me. 

I'll put my simple case study and see if I get answers. 

I'm a member of clergy in a church, we have out congregation database, that we have on a central computer. Me and the other clergy members also have the contact information for the church members on our smartphone. The very basic idea here, is that I would like to move the database to be on the cloud, while any of us (clergy+office staff) makes any changes on the contact information of the members all the other devices involved (in this case smart phones or the database on the cloud) be instantly updated. 

My questions now are:

1-Which zoho application is right for me? 

2-Is the synchronization feature that I'm asking for actually available? 

3-Should I build my own database and use zoho create for that, or is there an already similar app that I can use.

thank you in advance.