Signature for Rent - 5 Dollars a month.
Enabling him to participate in the results (sales revenue/profit generated) of his development efforts is a good way to keep him involved. I can`t speak to the percentage - but if you both agree that the exchange is value for value then it`s probably the right number. Be sure the agreement spells out ownership and rights.
However, before you move forward "officially - I`d suggest giving some thought to your business structure.
If you`d like to discuss your specific situation, send me a PM or contact me directly.
Good idea on offering an incentive, but what is Plan B? By that I mean, once the applications and scripts are developed, how critical will this person be to the improvement to and the maintenance of them?
Other questions and thoughts that come to mind:
Granted, assuming the relationship is tight, the above won’t happen. But stuff does happen. That is why there are things called lawsuits.
What is really comes down to is this – what level of risk are you comfortable with? Once you determine that, it doesn’t matter what any of us suggest, you go forward.