A keyword inspection is a snapshot of a search result: who ranks, how strong they are, how much traffic the term carries. One snapshot is useful. A series of them is a competitive intelligence feed.
Applyra now keeps every inspection you run, with its traffic score, its difficulty and the apps that held the top positions that day. Reopen one weeks later and the comparison does the work for you: a result page where the same five apps have been sitting since March is a very different opportunity from one that turns over every fortnight.
Your history is in the Keywords Inspector, under the search field.