Question
The app is three years old. I have an iPad version, iPhone paid version, and an iPhone lite version. Last 12 months it's done $14,112 in sales. Since day one it's done $99k in just sales. I outsource all the work. Don't know exactly how much I've put into it, but it's a good amount.
Answer
Actually, the standard is past (4 months' revenue) x 9 but lately it has been going down.
However, your mainly selling your brand and users therefore it should never just a math problem.
Let me know if you want to further discuss with more details specific to your case.
