A7 is an editor-based PIM(Personal Information Manager) or Schedular.
I wanted to have better schedular on both online and offline everytime. It would be good to have some collaboration between on/off tools, but it is minor priority.
For offline, finally I select just A4 size (=~ letter size in the U.S.) size paper folded into 3 times(A4 -> A5 -> A6 -> A7) and ball-point pen.
This project name (A7) comes from this inspiration.
For online, I wanted to have life-time schedular and easy...