As I recall, only two groups are available for use in the free version. Paying unlocks the other two, so you can do full street-by-street analysis, narrowing ranges as you get to the river.
EDIT: From http://combonator.com/buy ...
The Combonator is free
, however by purchasing a license you unlock additional advanced features like:
- All 4 groups unlocked
- Hand Values tab for board texture analysis.
- Email Support
And many more pro features are planned soon, including undo/redo, saving and restoring, and advanced hand value selection and output. Purchase now to get free upgrades!