Nice. As a potential user I have two questions. 1. As a consumer, I would like to have such an editor / viewer for my phone, is there something alike for train

Nice. As a potential user I have two questions. 1. As a consumer, I would like to have such an editor / viewer for my phone, is there something alike for traindown? 2. Functionality-wise, wouldn't a nice editor/viewer app necessarily be a subset of spreadsheet-like app and isn't traindown then competing against such a more general app? (Not that I know a single FOSS spreadsheet app, so I'm speaking hypothetically)