Software prices
move at night.
We catch them.

How it is computed. A movement counts only where a confirmed change holds the same number of prices before and after, each pair in the same currency — so every figure is a price compared with the price it replaced, on the vendor's own page, with both readings and both dates recorded. 8 of the 11 matched movements rose and 3 fell, between -51.7% and +107.1%; the mean is +19.5% and the median is the headline because a mean over a base this size follows its extremes. What is refused: readings not yet confirmed by a second clean read; plans that appeared or were withdrawn, which change a ladder rather than a price; ladders that did not move one-for-one; and weighting of any kind, because the record holds no revenue or seat counts. It is an index of observed list-price movement across 3 of 156 tracked tools — not a claim about what the market spends.