[tpoacher]

I have a pretty similar system, except instead of pen and paper and 'symbols', it's "folder with files with custom icons" (a process made extremely easy with Total Commander on Android).

It works like a charm, and can be synced with Dropbox for access from all relevant devices. In theory you can go nuts with it and even create scripts when things change in dropbox, but I haven't seen the need for that.

It is true, however, that there is something about having a piece of paper in front of you that still beats having to physically grab your phone to check stuff (and obviously I don't have devices to spare in order to waste one of them as a glorified picture-frame so that it's in front of me all the time). Which means I've often found myself jotting down notes on paper anyway. So Analog does seem interesting in that regard ...