Excel Add In trial

I created an excel add in and I was letting people use it for free (to evaluate) . I revised the add in and I want to sell it now. I will allow a 30 day trial period and only want to allow one installation per computer. Once the trial period expires, I want the new add in disabled(unless purchased) and want to prevent the user from reinstalling the older free(evaluation) add-in that does not have the trial period.

I will also need a website to market the add-in and accept payments/keep track of users and bill monthly etc. I have attached the evaluation file.

Skills: PHP, Software Architecture

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About the Employer:
( 1 review ) phoenix, United States

Project ID: #1121821

5 freelancers are bidding on average $476 for this job


Please see details on PMB.

$480 USD in 14 days
(5 Reviews)

Please read you PMB.

$720 USD in 3 days
(3 Reviews)

You could use registry method which will be loaded on every addin started. So, it will check the date of usage. It will record the last date usage and date of install. If user tries to modify the date, it will know bas More

$350 USD in 3 days
(12 Reviews)

Please see PMB

$330 USD in 0 days
(12 Reviews)

Hi, read PM!

$500 USD in 15 days
(0 Reviews)