It allows you to read the thousands of freely distributed reference docs available on the web.
Docs are searchable and bookmarkable.
You can also make your own docs if you buy Aportis' software for doc-making. Can be used to read many freely available databases such as zip code, area code and other databases. The pay-for version gives you the ability to make your own databases which you can distribute. Targeted at those who do not want a commercial viewer but prefer something smaller and simpler. Can be used to read many freely available databases such as zip code, area code and other databases.