Create Website Form and Collect Info in Spreadsheet style

Create Website Form and Collect Info in Spreadsheet style

I have a wordpress website, I have website hosting.
I would like to add a login first.
Once logged in the user would have to fill out a contact form.
Instead of the contact form sending me an email with the info, i want the info to stay collected in a spreadsheet.

It will be used at an office, and the front office worker will be inputing the info.
first there are two choices: Walk-in, Call-in
I want to be able to add a contact info for the rest.
i need some other fields that i may update or change later as to the reason for the visit today.


The main thing is now after the info has been collected and sent, I want to feed the info into a database, and I want to be able to view all entrees in an invoice style or like a list of emails, but i need to be able to change to sort by name, number, time, date, etc.
I need to be able to search the list to find a name or number, or any other field.

If you know a form builder that can accomplish this and you can set it up let me know.

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Requirements

I dont really want a custom built/coded site for this as i may need help with the code later, and may have trouble with it, or if wordpress updates and messes up the stuff, i would prefer a current plugin that satisfies my problem and will work with future updates.

It has to:

• be a backend website for info to be filled out by my users.
  
• modify input fields: Drop-down, date, number fields, selection
  
• be able to collect info into a database for me to view, sort, and modify/add notes or update status
• *bonus if it has a iPhone app to view data

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Skills Required

Website Coding Database Internet