Tracking competitor listings sounds simple until you look at what the stores return. Apple re-hosts an app icon under a fresh URL on almost every build, byte for byte identical. Screenshots come from two different sources whose URLs cannot be compared with each other. Compare URLs, and a third of your alerts are about changes that never happened.
Applyra now compares the content itself. Icons are matched on a hash of the image rather than its address, screenshots are compared within a source instead of across two, and a listing that comes back empty from a store outage is treated as an outage rather than as a competitor deleting their assets.
Every historical release and notification was re-examined against the new rules and the phantom ones removed, so your release timeline shows what actually shipped.
An alert that cries wolf is worse than no alert. This is the release that made competitor notifications something you can act on.