You can also find a mixing calculator for android, designed by forum member jrob3rts.
Drops added, and option to change number of drops per ml under settings.
Display / GUI Enhancements - Basically a complete redesign of the input screen.
Results is no longer force loaded. You can now click Calculate / Results to see the outcome.
Slider for PG:VG Ratios. You can now have 0-100 PG:VG Ratios.
Ability to Export and Import Single Mixes.
Screen On. Available from the settings menu.
Added lines in the results screen to make each component clearer.
Allowances for zero nic mixes.