DiskSense itself is not a very expensive unit. Even if we sell the product without it, the price won't be much lower. Here is the full list of DiskSense features:
http://atola.com/products/insight/disksenseAt this time I am not sure if there will be a "software-only" version. It just does not make much sense to me. However, we do plan to give away a light version of Atola Insight for free

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Once we get the first release out, we will think about buying options and free version. At this time it is too early...