A good app with tons of cool features. As far as I can see it works fine, the most useful feature probably being the price graph under every product.

However Keepa is sometimes extremely slow when it comes to notifying you of a price change. Like hours too slow.

First of all it seems to only be able to refresh your tracked product once an hour.
And then when it does refresh, it can delay sending you the notification even further for some reason.

I tried using it to track an extremely in-demand product, which flew off the shelf almost immediately after it got there. Keepa sent me a heads up on messenger. 2 hours after the thing sold out.

This method of operation/occasional hiccups are probably fine when trying for regular amazon deals that normally last a few hours(which is what I will continue to use it for), but for tracking availability, it's not optimal.