How do I build an app
Hey @Matthew, first you need to learn android language , which you can learn from
or search on google and you will find many courses over there .
Then design basic app on android studio, after this you can use any open source project to learn and then you can make(build) your own android app [In case of ODK as ODK runs on android plateform] .
If you already knew android programming language then you can clone ODK from github and then make changes which you want and then make your ow app. However, you can not upload your own customize ODK app without changing objects and class names.