Mariner Software has introduced a lifetime product upgrade plan.

Mariner is the developer of Mariner Write and Mariner Calc for the Mac.

Under the lifetime upgrade plan, customers can pay a one-time fee of $49.95 per copy per product. In return they are promised: "Every major upgrade for the lifetime of the registered products(s), delivered automatically to their inbox on the day of release."

"Our Lifetime Upgrade Plan takes every business concept about the software industry upgrade model and flushes it down the toilet," said Michael Wray, president of Mariner Software.

"At some point in time, a software developer has to look at helping the customer opposed to helping the bottom line. We think we've accomplished that with the Lifetime Upgrade Plan."