It was a $5 paid app for about three years. Usage numbers of the communication system it was built upon went down overall (people started using alternative systems) and the amount of users went down, so I changed it to free + $5 iAP.<p>In retrospect, I should’ve charged $8&#x2F;$10&#x2F;$15 for the app. I’m 99% sure it wouldn’t have made a difference to the amount of sales, but it would have doubled my profit.