I'll give you an example. I once did an Android app for a conference. However the data model was so generic that it basically could've been reused for any other

I'll give you an example. I once did an Android app for a conference. However the data model was so generic that it basically could've been reused for any other conference. If you're motivated as such, the whole thing could very well be an excellent opportunity to sell a product, instead of one single month of subcontracting.