Employees As Users - I'm confused about adding users.

Employees As Users - I'm confused about adding users.

Hi, I have a .Net background so I'm getting there (slowly) with Creator however I have got myself really confused with adding users. 

I am building an Employee Time Management app for a client and I want to be able to have multiple employee's that can see only their own information when they login (which I think I can do), however does that mean that each employee has to be added as a user? 

https://www.zoho.com/creator/help/overview.html#share

There is no way the client is going to pay $10/user per month for each employee to access it which if I'm reading it correctly also means each employee has to have a zoho email address which makes it $20/user/month. 
https://www.zoho.com/creator/pricing-comparison.html

Am I understanding that correctly? 

I guess what I want to do is have each employee be able to login and update/edit their own info and timesheets. I come from a database background so my plan was to create the app, add a login page, test against the Employee's table and show that employee info based on their login. Now however I can't seem to work out how to do that. It seems I have to share the app with users and do it that way. 

Can anyone help me clarify if I can do what I want or if it is all based around users for access.

Jenny