Design Sage -app around Workflow
Workflow contains fast note-taking-sharing-OCR -app and writing -app. The note-taking -app does not exist yet but good ideas . I would like to see Sage more like "mathematica" but more note-taking-oriented in iPad hence  and more LaTeX -oriented, automatic-export-to-LaTeX -etc and easy TeX -preprosessors needed .
Sage -computation and writing -- perhaps integrated to TeX Writer -app (?)
TODO -- perhaps integrated to GoodReader and Appigo Todo -app (?)
Note-taking -app (this does not exist yet)