[kentonv]

Not "rewrite". You do have to tweak apps to be Sandstorm-appropriate, but it's usually somewhere between five minutes and a couple days of work. Namely:

* Delete the login system and use Sandstorm's. If you build on Meteor, for instance, this is a simple matter of swapping dependencies.

* Delete your sharing system. If the app hosts multiple things that can be independently shared, change it to host only one such thing. The user can create multiple instances of the app and using Sandstorm's sharing. This is probably the hardest part, but we've done it for several apps now without too much trouble. Since it's largely deleting code, it's not very difficult.

* Find the places where your app connects to the outside world and insert a bit of code to make a Sandstorm powerbox request to get permission first, then address the requests to that permission.

None of this involves "rewriting". We have 20+ apps on the Sandstorm app list, most of which were ported by two people who certainly didn't have time to rewrite each one.

[ocdtrekkie]

I've ported apps to Sandstorm with literally no prior experience with the languages those apps were written in. Porting to Sandstorm involves more deleting stuff you don't need than actually writing code yourself. :D