Hi all..I've got an android.i would appreciate an easy app (free of course, or ,my coupon queen wife'll have a migraine ) from play store that will help me mix.got plenty of mty bottles lol.glass dropper type & plastic squeeze 10-30ml.I use atlantis tank , and I stick, (don't go past 30w..getting expensive ) ordered vg&flavor concentrate ..from bull city..didnt receive pkg yet..any advise? Could use the help.i mix store fruit loops/liturgy/gummy bear and add a little pure menthol now.and like max vg..thx