Questsin's Excel Add-In works similar to the Fill Data feature in Excel. Both features are independent and can co-exist. While Excel's built in Fill Data works well with some dates, numeric linear/series sequences and fixed captions, Questsin can expand any list. The accuracy is directly proportional to the samples it is given. 5 samples give fairly good results. The list is generated with Artificial Intelligence Algorithms against Web crawler/spidered data.
As more information is crawled, the questsin service is improved. User queries are also used to validate lists. To use Questsin Add-In you must be online. Version 2 may include unspecified updates, enhancements, or bug fixes.