Absolutely. As a general rule, never work for free, period. Not only will you not get income, but your business clients won't respect you or your product. I me

Absolutely. As a general rule, never work for free, period. Not only will you not get income, but your business clients won't respect you or your product. I mean it's ok to include a week or two to fix bugs that you might have missed, but be up front about that window and make sure that you differentiate bugs with features. Clients might blur that line.