I'd let the user choose in such a way that they think they get a bargain with the lifetime pass. Something like $2.95 for one time, $3.95 for a month and $4.95

I'd let the user choose in such a way that they think they get a bargain with the lifetime pass. Something like $2.95 for one time, $3.95 for a month and $4.95 forever. I guess you have to be careful in your terms and conditions when you say "lifetime", right? Obviously, you mean the lifetime of the product, not the client's