Thanks for your response :-)

Double tap: Yes I know the double tap is a little bit tricky and not obvious at all, so having a special button and or a menu entry would be nice. A meny entry is not a problem - however "add", "remove", "edit" and "use" buttons would take away screen space. And I value screen space on the Nokia as important (what would be a list where you can only see tree entries;-)). However if there is a majority of people finding button more important than space that can be easily changed (othe rideas are of cause laso welcomed).

IMHO the best solution would be to just use drag (from left) & drop (to right) in this case. Sadly my GUI library curently does not support drag & drop (earlier incarnations i a different computer language did) and currently I lack the time to implement this.

Yes there are import/export menu entries and they are working and can be freely used. Just export your entries and analyse the resulting XML file for its structure. It is very simple. I can also add support for other (simple) formats if there is interest. Notr that exports only exports the left table.

If there is copyright free data material I could also offer pre-installed import files (or add data files from somebody else).

(I'm a little bit in hury and away till next friday so I do not explain the export/import file format here and now).

Note that there are curently two known bugs in WeightJinni:
Cliping of value bars in the graph is buggy (this is already fixed) and sometime the line drawing seems to miss intermediate points and thus there can be jumping lines while scrolling (not yet investigated).

I also plan to improve the statistics part a little bit for the next version.