Obviously keep the keys to the castle out of version control. I wrote a small blog post [0] on a similar topic not too long ago. I went with the BSD 3 Clause

Obviously keep the keys to the castle out of version control. I wrote a small blog post [0] on a similar topic not too long ago. I went with the BSD 3 Clause license for the project I am working on [1][2]. I am not a lawyer so I have no idea if this is a good license or not. I was going for one that would force people to retain the copy right notice. Obviously you would control the developer account and name of the app. So it would take some effort and money for someone to rename and republish under a new app name. [0]http://www.wlaurance.com/2014/01/A-Different-Approach-to-Protecting-IP http://www.wlaurance.com/2014/01/A-Different-Approach-to-Pro... [1]https://github.com/t3mpus/tempus-api/blob/master/LICENSE https://github.com/t3mpus/tempus-api/blob/master/LICENSE [2]http://www.t3mp.us http://www.t3mp.us