As a long time Moz user and I might even say a super fan of their product, it feels really odd to be writing a review of Ahrefs. But here we go--I love Ahrefs. The design, the UI, the gigantic keyword database and now the newly redesign site audit are a thing of beauty. I continue to be impressed by the data they provide, features that are added frequently and my favorite feature has to be the top pages report. (Not sure why I love that so much--but it just makes it extremely simple to research a site or competitor with that report.)
Ahrefs make use of two link updates in your website - the Fresh Index and the Live Index. Fresh Index which updates at a longer time frame. It shows the dead links on your website, giving you the chance to change or reclaim the dead link. The Live Index, on the other hand, makes link updates every 15-30 minutes. This provides you with the chance to see regular link updates on your website.